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Introduction: An antenatal scoring system for vaginal birth after caesarean section (VBAC) categorises patients into a low or high probability of successful vaginal delivery. It enables counselling and preparation before labour starts. The current study aims to evaluate the role of Grobman nomogram and the Kalok scoring system in predicting VBAC success in Singapore. Methods: This is a retrospective study on patients of gestational age 37 weeks 0 day to 41 weeks 0 day who underwent a trial of labour after 1 caesarean section between September 2016 and September 2017 was conducted. Two scoring systems were used to predict VBAC success, a nomogram by Grobman et al. in 2007 and an additive model by Kalok et al. in 2017. Results: A total of 190 patients underwent a trial of labour after caesarean section, of which 103 (54.2%) were successful. The Kalok scoring system (AUC [area under the curve] 0.740) was a better predictive model than Grobman nomogram (AUC 0.664). Patient’s age odds ratio [OR] 0.915, 95% CI [confidence interval] 0.844–0.992), body mass index at booking (OR 0.902, 95% CI 0.845–0.962), and history of successful VBAC (OR 4.755, 95% CI 1.248–18.120) were important factors in predicting VBAC. Conclusion: Neither scoring system was perfect in predicting VBAC among local women. Further customisation of the scoring system to replace ethnicity with the 4 races of Singapore can be made to improve its sensitivity. The factors identified in this study serve as a foundation for developing a population-specific antenatal scoring system for Singapore women who wish to have a trial of VBAC. Keywords: Antenatal scoring system, caesarean section, obstetrics and gynaecology, trial of labour after caesarean section, vaginal birth after caesarean section

The factors associated with the outcome of trial of labour after one previous Caesarean Section; a retrospective cohort study. A retrospective observational study was performed on all eligible consecutive singleton pregnancies planned for trial of labour after one previous Caesarean Section (TOLAC) over a period of 18 months to study the success rate of vaginal birth after Caesarean Section (VBAC) and to find out the factors associated with successful and failed TOLAC. All of the data were entered in electronic format and the data was analysed in detail. Of the 1324 women studied, the VBAC rate was 65.3% and the incidence of scar rupture was 0.5%. The composite adverse maternal (postpartum haemorrhage and intensive care admission) and foetal outcome (still birth, 5-minute APGAR7 and NICU admission) was more in the failed TOLAC group. Various demographic, clinical and obstetric factors were studied in detail between the successful and failed TOLAC groups. The favourable Bishop Score (4) was independently associated with successful TOLAC (OR 4.3; 95% CI 3.3-5.6

Összefoglaló. Bevezetés: Az új koronavírus (SARS-CoV-2) okozta pandémia számos változást eredményezett életünk minden területén, így a debreceni Szülészeti és Nőgyógyászati Klinikán is. Célkitűzések: A koronavírus-járvány többek között a terminus körüli elektív szülésindukciók gyakorlatának megváltoztatását igényelte. A bevezetett új szakmai eljárásrendeknek, járványügyi intézkedéseknek, a megyei kórházi funkciót ellátó debreceni Kenézy Kórház Szülészeti Osztálya és a Szülészeti Klinika összevonásának, illetve a megváltozott jogi környezetnek a szülészeti ellátásra kifejtett együttes hatásait elemezzük. Módszerek: Helyi protokollokat és részletes eljárásrendeket készítettünk és vezettünk be. 1. Szülésindukció. 2. Szülésindukció cervixérlelést igénylő esetekben. 3. A szülés módjának megválasztása előzményi császármetszés után. 4. A császármetszés utáni hüvelyi szülést támogató, terminus körüli gondozási protokoll. A protokollok bevezetését követő első 9 hónap szülészeti mutatóit (szülésszám, császármetszések aránya, perinatalis kimenetel, szülésindukciók aránya és sikeressége) vizsgáltuk és hasonlítottuk össze a megelőző időszak debreceni adataival, illetve az országos szülészeti mutatókkal. Eredmények: Klinikánkon a császármetszés aránya 2020-ban 33,5%-ra csökkent, a protokollok bevezetése óta pedig 30,7%, miközben a 2020. évi magyarországi arány 40,3%. Az összes szülés 20%-a volt 2020-ban szülésindukció, melyek közül 74% végződött hüvelyi szüléssel, míg ugyanez 2019-ben 11% indukcióból 47%-nak adódott. A havi szülésszám 2020. január és 2021. január között folyamatosan emelkedett (250-ről 450-re), a havi császármetszési arány pedig 41%-ról 25%-ra csökkent. Mindezen változások mellett 2019-ről 2020-ra csökkent mind a perinatalis mortalitás (6,3‰-ről 4,2‰-re), mind a szülés után a Neonatalis Intenzív Centrumba történő felvételek aránya (14,8%-ról 13,5%-ra). Következtetések: A bemutatott tényezők együttes hatásaként – elsődlegesen a megfelelő és következetesen betartott protokolloknak köszönhetően – a szülésindukciók aránya és sikeressége jelentősen növekedett, a császármetszések aránya szignifikánsan csökkent, javuló perinatalis morbiditási és mortalitási mutatók mellett. Orv Hetil. 2021; 162(21): 811–823. Summary. Introduction: The pandemic caused by the new coronavirus (SARS-CoV-2) has catalized several changes in many fields of our lives, and also at the Department of Obstetrics and Gynecology of the University of Debrecen, Hungary. Objectives: We wanted to analyse the compound effect of our new local protocols regarding elective labour inductions at term, the coronavirus pandemic and the resulting infection control measures, the merging of the Obstetrics and Gynecology Ward of the Kenézy County Hospital of Debrecen and the University Department of Obstetrics and Gynecology, and also the change of the legal environment. Methods: Local protocols were introduced: 1. Labour induction. 2. Cervical ripening in labour induction. 3. Choosing the route of delivery after cesarean. 4. Management of pregnancy around term in the case of planned trial of labour after cesarean. We compared the obstetrical data (number of deliveries, cesarean section rate, perinatal outcome and the rate and success rate of labour inductions) before and after the implementation of the protocols. The results were also compared to the Hungarian national database. Results: The annual cesarean rate at our department dropped to 33.5% in 2020. In the first 9-month period, after the introduction of the new reforms, the cesarean rate decreased to 30.7%, whereas the Hungarian national rate was 40.3% in 2020. At our department, 20% of all the deliveries were induced and 74% of them led to vaginal deliveries in 2020, while in 2019 only 11% of deliveries were labour inductions, and 47% of these cases were vaginal deliveries. The monthly number of deliveries was rising constantly between January 2020 (250 deliveries) and January 2021 (450 deliveries), and the monthly cesarean rate decreased from 41% to 25%. Comparing the data of 2019 and 2020, the annual perinatal mortality rate dropped from 6.3‰ in 2019 to 4.2‰ in 2020. Neonatal morbidity, as measured by admissions to the neonatal intensive care unit, also decreased (14.8% in 2019 and 13.5% in 2020). Conclusions: As a compound result of the described factors, but mainly due to the new protocols, both the rate and the success rate of labour inductions increased significantly, while the cesarean rate decreased with improving perinatal mortality and morbidity. Orv Hetil. 2021; 162(21): 811–823.

BACKGROUND: Customized clinical and administrative interventions in the form of a care pathway tool can improve VBAC outcomes and reduce the alarming rise in caesarean sections globally. OBJECTIVE: To determine the effect of a locally tailored clinical pathway tool on VBAC outcomes in a private hospital in India. METHODS: A pre- and post-implementation study was conducted in a private hospital in India. All women with one previous caesarean section term pregnancy and cephalic presentation were included at baseline from January 2013 to December 2015 (Phase 1) and from January 2016 to December 2018 (Phase 2) after ongoing implementation of a clinical pathway tool by all providers. Background characteristics and clinical outcomes in both phases were reviewed retrospectively from case files. RESULTS: Overall 223 (13.42%) women among 1661 total births and 244 (11.62%) women among 2099 total births were included in Phase 1 and Phase 2, respectively. Total number of women who underwent trial of labour (TOLAC) increased from 36.77% to 64.34% (P

Introduction: The prevalence of cesarean deliveries is high in many parts of world. Vaginal birth after cesarean section (VBAC) is a trial of vaginal delivery in selected cases of a previous CS in a well equipped hospital. It offers distinct advantages over a repeat caesarean section, since the operative risks are completely eliminated, the hospital stay is much shorter and expenses involved are much less. Objectives: To study the maternal and perinatal outcomes among women with previous Cesarean section at a tertiary care centre. Materials and Methods: This prospective study was carried out over a period of 12 months. 979 pregnant women with previous caesarean section were recruited in study. A detailed history was taken and mode of delivery decided as per the standard protocol. 636 patients underwent elective repeat LCSC.343 patients were given trial of labour out of which 226 delivered vaginally. Maternal and neonatal outcomes were noted Result: The rate of successful VBAC was 65.89%. Most common indications of repeat caesarean section were fetal distress and failure to progress. Post op maternal and neonatal complications were significantly more in repeat caesarean section group. Incidence of infectious morbidity was also higher in repeat cesarean group than VBAC group. Conclusion: Fetal morbidity and mortality due to trial of labor is comparable with the women laboring without a scar, trial of labour may be encouraged. women given trial of labour with careful monitoring and taken for emergency LSCS on minimal indication is the best answer to management of previous one or two CS. Keywords: VBAC, TOLAC, Emergency cesarean section, Perinatal morbidity.

Objective To develop and implement a trial of labour after cesarean delivery (TOLAC) bundle—a group of interventions aimed at decreasing cesarean delivery (CD) for women who have had a prior CD (Robson group 5). Methods A TOLAC bundle was developed that included: (1) educational rounds for health care providers, (2) a physician–patient TOLAC discussion aid, and (3) patient-centred educational resources. A before-and-after study design was employed. A one-year chart review determined baseline CD rates in Robson group 5 patients at a tertiary care academic centre. Following this, from February 1, 2018 until May 31, 2019, each bundle intervention was sequentially introduced every four to six months and modified based on provider feedback. Obstetricians were provided with their individual CD rates using an audit-and-feedback approach prior to the introduction of the next intervention. Results The baseline CD rate for Robson group 5 patients was 71% (175/247 eligible patients). Following the introduction of the bundle, the CD rate decreased to 61% (131/214 eligible patients). This was a 10% decrease in the CD rate (P = 0.029). A significant increase in rate of induction was noted, from 5% pre-intervention to 11% post-intervention (p = 0.017). There were no significant decreases in the rate of vaginal birth after CD or increases in the rates of uterine rupture or NICU admission. Conclusions A TOLAC bundle, consisting of provider education, a TOLAC discussion aid, and patient resources, combined with audit and feedback, decreased CD for Robson group 5 patients.

Background During the last decades, the rate of caesarean section is increasing and this can increase the mortality and morbidity. Up to one third of the caesarean sections are attributed to the elective repeat caesarean section (ERCS). This study aims to evaluate attitudes and factors affecting the choice of pregnant women with one previous caesarean section regarding their mode of delivery in their second pregnancy. By assessing these attitudes, this study can help the efforts in developing strategies to increase the rates of vaginal delivery. Material and methods A cross-sectional design was conducted by a structured questionnaire on 166 pregnant women who had delivered once by caesarean section for their first pregnancy and were in the third trimester of their second pregnancy. Any women with an absolute indication for caesarean section was excluded. The study comprises women who attend the clinic at our center in Northern of Jordan. Proper statistical tests were performed to assess the association between the choice of delivery and selected demographic and clinical factors. Results About 55.4% responded that they would choose ERCS (n = 92) and the remaining participants chose trial of labour after caesarean section (TOLAC) (n = 74). Fear of pain was the most common reason for choosing caesarean section, accounting for 55.4%. Interestingly, our study did not show a significant association between the mode of delivery and demographic factors, such as age, educational level and occupation. The single independent significant factor influencing patients’ choice that our study revealed was “being informed about the complications of TOLAC”. The choice of TOLAC was almost four times higher for those participants who had been informed about the complications, compared to those who had not been informed. Conclusion Proper counselling is a main factor that affected the patients’ choice toward the mode of delivery. Proper pain management may encourage patients to choose TOLAC because fear of pain was a main reason that patients requested ERCS instead of TOLAC., Highlights • Pregnants with a previous caesarean section has the right to choose TOLAC or ERCS. • Pregnants should be aware about the risks and benefits for each mode of delivery. • Proper counselling pain management are the main factors affect their choice. • Knowledgeable pregnant women tend to choose TOLAC over ERCS.

Elective caesarean section (CS) is the safest means of delivering the litter in bitches in specific situations. Timeously performing elective pre-parturient CSs at a fixed time would be convenient and prevent emergency CSs and foetal demise. This review proposes a method of performing elective pre-parturient CSs which is safe for both the bitch and puppies. Brachycephaly, small litters and large litters, preceding litter delivered by CS and trial of labour after a preceding CS are identified as factors increasing the need for CS whereas emergency CS is identified as factor increasing foetal demise. The first day of cytological dioestrus more precisely predicts the day of onset of spontaneous parturition than the first day of the LH surge or the dates during oestrus on which progesterone (P4) first exceeds 6 nM or 16 nM. Foetal biparietal diameter at the time of onset of spontaneous parturition varies too much to accurately predict readiness for CS. During the last few days of gestation, P4 with cut-off concentrations at 15.8, 8.7 and 3.18 nM, but not plasma cortisol concentrations, hold promise as predictors of onset of parturition and when to perform pre-parturient CSs. A protocol associating medetomidine hydrochloride as premedicant with propofol as induction agent and sevoflurane as maintenance is safe for scheduled CS and yields good maternal and puppy survival rates at delivery, 2 hr and 7 days after CSs. Clinicians have to pay attention to the haematocrit of bitches at the time of cervical dilatation which is at the lower end of the normal reference ranges for non-pregnant dogs and to the decline in haematocrit during CS (as a proxy for blood loss) which is approximately 7% for both parturient (open cervix) and pre-parturient (closed cervix) CSs. Pre-parturient CSs can be scheduled and performed 57 days after onset of cytological dioestrus with puppy survival rates of 99%. Collectively, these studies provide a protocol to safely perform elective CSs in a large proportion of the obstetric population at a convenient time of the day but more research is required with larger numbers to establish whether this practice is routinely safe and safe in all breeds.

Objective To examine rates of cesarean delivery (CD) and vaginal birth after cesarean delivery (VBAC) and the patient profile in a community-based obstetrical practice. Methods Retrospective data from 2012 to 2017 for the Sioux Lookout Meno Ya Win Health Centre (SLMHC) were compared to data from the 30 hospitals providing the same level of services (Maternity 1b: maternity care by family physicians/midwives with CD and VBAC capacity) and Ontario. SLMHC VBAC patients were then compared to the general SLMC obstetrical population. Data included maternal age, parity, comorbidities, CD, VBAC, neonatal birth weight, and Apgar scores. Results The SLMHC obstetrical population differed from comparable obstetrical programs, with significantly higher rates of alcohol, tobacco, and opioid use and a higher prevalence of diabetes. CD rates were significantly lower (25% vs. 28%), and women delivering at SLMHC chose a trial of labour after CD almost twice as often (46% vs. 27%), resulting in a significantly higher VBAC rate (31% vs. 16%). Patients in the VBAC population differed from the general SLMHC obstetrical population, being older (7 years) and of greater parity. The neonates of VBAC patients had equivalent Apgar scores but lower rates of macrosomia and lower birth weights, although the average VBAC birth weight at 3346 g was equivalent to the provincial average. Conclusion The SLMHC obstetrical program has lower CD and higher VBAC rates than expected, despite prevalent risk factors typically associated with CD. Our study demonstrates that VBAC can be safely performed in well-screened and monitored patients in a rural setting with emergency CD capacity.

Background Uterine rupture is a rare obstetric emergency, and the rate of rupture has increased over time with the rising rate of caesarean section (CS) and trial of labour after CS (TOLAC). Aim To determine the prevalence, and maternal and neonatal complications associated with complete uterine rupture at a New Zealand (NZ) tertiary referral hospital over an 11-year period. Material and methods This is a retrospective, observational study. Waikato Hospital records of patients with uterine rupture occurring between 2008 and 2018 were reviewed for risk factors, delivery outcomes, and maternal and neonatal complications. Results There were 32 patients with complete uterine rupture in 38 182 births, conferring a prevalence of 8.4 per 10 000 births (95% CI 5.9-11.8). Of the 29 cases occurring during labour, 83% of patients were multiparous, 59% previously had one or two CS; patients with an unscarred uterus had lower rates of emergency CS and high rates of postpartum haemorrhage than patients with a scarred uterus. There were no maternal deaths although three patients required peripartum hysterectomy, 63% required blood transfusion and there were five (16%) perinatal deaths. Conclusion The prevalence of uterine rupture in this NZ tertiary hospital is comparable to other developed countries. There was no maternal mortality but there was a 16% perinatal death rate. Patients with spontaneous labour and an unscarred uterus were not exempt from this rare complication. There is a need to manage labour judiciously in all patient groups and to maintain a high level of suspicion for uterine rupture.

Vaginal birth after caesarean (VBAC) is an option to avoid major abdominal surgery and many consequences related to repeated caesarean delivery. In the last years, many efforts have been made to increase the number of patients attempting trial of labour after caesarean (TOLAC). The aim of our study was to identify the most important factors associated with the success of VBAC. A retrospective study was conducted in two Italian referral centres. Subjects included were singleton and morphologically normal pregnancy with previous C-section. Subjects with an inter-pregnancy interval shorter than 18 months, a large for gestational age baby, a pregnancy complicated with gestational diabetes and a previous unclassified uterine scar were excluded. The characteristics of the subjects were compared and a logistic regression was performed to evaluate variables associated with successful VBAC. Of the 300 patients included, 224 (74.7%) achieved VBAC while 76 (25.3%) underwent C-section after failed TOLAC. The number of previous C-sections was not significantly associated with the success of TOLAC. Factors positively associated with achievement of VBAC were previous vaginal delivery (OR of 6.88 for one and 9.68 for more than one) and oxytocin implementation (OR 3.32). No maternal and neonatal adverse events occurred. Our results show that attempting VBAC is a feasible option in referral centres after adequate evaluation of the potential factors affecting the probability of success. A careful record of obstetrical history and management of labour can provide clinicians useful information to counsel women before and during labour.

Objective To investigate whether the use of intrauterine tocodynamometry versus external tocodynamometry (IT versus ET) during labour reduces operative deliveries and improves newborn outcome. As IT provides more accurate information on labour contractions, the hypothesis was that it may more appropriately guide oxytocin use than ET. Design Randomised controlled trial. Setting Two labour wards, in a university tertiary hospital and a central hospital. Population A total of 1504 parturients with singleton pregnancies, gestational age ≥37 weeks and fetus in cephalic position: 269 women with uterine scars, 889 nulliparas and 346 parous women with oxytocin augmentation. Methods Participants underwent IT (n = 736) or ET (n = 768) during the active first stage of labour. Main outcome measures Primary outcome: rate of operative deliveries. Secondary outcomes duration of labour, amount of oxytocin given, adverse neonatal outcomes. Results Operative delivery rates were 26.9% (IT) and 25.9% (ET) (odds ratio 1.05, 95% CI 0.84-1.32, P = 0.663). The ET to IT conversion rate was 31%. We found no differences in secondary outcomes (IT versus ET). IT reduced oxytocin use during labours with signs of fetal distress, and trial of labour after caesarean section. Conclusions IT did not reduce the rate of operative deliveries, use of oxytocin, or adverse neonatal outcomes, and it did not shorten labour duration. Tweetable abstract IT (versus ET) reduced oxytocin use in high-risk labours but did not influence operative delivery rate or adverse neonatal outcomes.

Background: The purpose of this study was to compare maternal and perinatal outcomes in a trial of labour after caesarean (TOLAC) and an emergency repeat caesarean delivery (ERCD). Design: A one-year prospective observational study at a tertiary care centre. Methods: Selection of candidates for Vaginal Birth after caesarean section (VBAC) was based on the 2010 American College of Obstetricians and Gynecologists’ (ACOG) recommendation. The maternal outcome was measured using the VBAC success rate, maternal complications, and the number of days spent in the hospital. The perinatal outcome was measured using the 5 minute Apgar score and the need for neonatal intensive care unit (NICU) admission. Results: Vaginal delivery was trialled on 250 patients. The success rate for VBAC was 169/249. (67.9 percent). Repeat CS was required for 80/249 (32.1%) of the patients. Cases with a Bishop score greater than 6 had a higher rate of vaginal delivery (89.6%) than cases with a Bishop score \(\le\)6 (17.4 %) (p=0.01). Spontaneous labour had better VBAC success rate (91.8%) than induced labour (55.5%) (p=

Introduction: Cesarean section rate has been on a continuous rise since 1970. When trial of scar is done, 30- 80% of women with one previous lower segment caesarean section can achieve vaginal delivery. Identification of the determinants of the success of TOLAC help in selecting the patients with favorable factors and hence improving the success rate of TOLAC with minimum possible complications. Materials and Methods: This study was planned from January 2015 to December 2015. Case files of previous one cesarean pregnancies were reviewed retrospectively in two groups: VBAC group and RCS group. Results: There were 9.8% (N-488) previous one cesarean pregnancies out of which 67% (327) underwent TOLAC. VBAC happened in 71.56% and RCS in 28.44%. Malpresentation, fetal distress, CPD and Failed induction were the indications of primary cesarean which had significantly more number of VBAC as compared to RCS (p value the spontaneous onset of labour was compared to induced labour. The mean admission bishops score of VBAC group was 6.952.72 and that of RCS group was 3.87 2.54 (p value- 0.000). Also the mean birth weight of the VBAC group was 2.660.53 and that of RCS group was 2.800.47 (p value- 0.027). Conclusion: Malpresentation, fetal distress, CPD and failed induction are the most important indications of primary cesarean section which have better chances of VBAC. Spontaneous onset of labour, admission bishops score and birth weight has significant affecton the outcome of TOLAC. Keywords: Trial of labour after cesarean (TOLAC), Vaginal birth after cesarean (VBAC), Repeat cesarean section (RCS), Previous one cesarean section, Determinants of success of TOLAC, Trial of labour after cesarean (TOLAC), Vaginal birth after cesarean (VBAC), Repeat cesarean section (RCS), Previous one cesarean section, Determinants of success of TOLAC.

Background The advanced maternal age rate increases in developed countries. Older women have more pre-existing condition than youngest women and develop more frequently obstetrical pathologies responsible for a higher rate of caesarean delivery before labour and labour induction. For aged nulliparous without pathology who experience spontaneous labour, there is few data on the mode of delivery and on physiological labour according to maternal age. Objective To compare the intrapartum caesarean delivery rate according to maternal age, for nulliparous with planned vaginal delivery and spontaneous labour at term. Methods Retrospective cohort in a single academic institution between January 2000 and June 2017. All nulliparous women with planned vaginal delivery with live singleton in cephalic presentation at and after 37 weeks of gestation with spontaneous labour were included (n = 10,611). Two groups were compared: nulliparous women aged 20–34 and nulliparous women aged 35 and over. The main outcome was the intrapartum caesarean delivery rate. A subgroup analysis was performed for nulliparous with more advanced maternal age defined as women over 40. Results Among the 10,611 women included in this analysis, 8,993 (84.8%) were aged 20–34 and 1,618 (15.2%) were aged over 35. From the latter 367 (22.7%) were over 40 years old. The intrapartum caesarean delivery rate was similar between women aged between 20 and 34 and women aged over 35 (10.8% compared to 8.8%; cOR 0.91, 95% CI 0.76–1.08; aOR 0.91, 95% CI 0.76–1.09). The indications of caesarean were similar in both groups. No differences were found between both groups for mean labour duration (430.9 min for the [20–34] years group compared to 428.0 min for the over 35 years group, p = 0.654). The subgroup analysis performed on nulliparous with more advanced maternal age yielded similar results. Conclusion For nulliparous at term in spontaneous labour, an advanced maternal age was not associated with an increased intrapartum caesarean delivery rate.

This study was designed to evaluate maternal and obstetrical factors associated with a successful trial of labour after one caesarean section (TOLAC) as well as evaluating the associated fetal and maternal outcomes and to determine the rate of vaginal delivery and repeated C/S. A prospective cross-sectional study was done on 237 women with previous one C/S then patients were selected for the trial of labour based on the department protocol. Those who were chosen for TOL were strictly monitored & observed for the progress of labour and the outcomes were recorded in terms of mode of delivery, maternal & fetal complications and were analysed and compared with those who had repeated C/S. Seventy-three (30.8%) patient was delivered by elective C/S without trial, 109 (46%) of the patients who were admitted to labour room delivered vaginally while 55 (23.2%) delivered by emergency C/S. It has been found that maternal BMI of (

Introduction: World medical community has raised concerns over the rising caesarian rates. Materials and Methods: This was a prospective, cross-sectional, hospital-based study to determine factors responsible for a woman’s choice of delivery, that is, caesarian delivery (CD) or vaginal delivery (VD). Pregnant women attending antenatal clinics, were interviewed with a structured questionnaire, and data was analyzed. Results and Discussion: 266 responses were analyzed, wherein, 186 women preferred VD and 80 women preferred CD. The characteristics of women who chose CD as their preferred mode of delivery, were compared with the women who chose VD as their preferred mode of delivery. Age, religion, occupation, and economic status did not influence a women’s choice of delivery. Factors strongly related included educational status, wherein, more educated women were likely to prefer CD. Contrary to popular perception gravida, para, number of miscarriages or living children did not influence the choice of delivery. 90% of women who had previous CD, preferred CD for this delivery, they were not aware of the option for trial of labour after caesarian. 49% (n = 45) of the 91 patients delivering in private hospitals underwent CD, as compared to only 13% (n = 11) of the 85 patients delivering in government hospitals. The high caesarian rates in private hospitals is partly driven by caesarian delivery on maternal request. Conclusion: Counsel the pregnant women regarding the process and benefits of normal VD, as well as the risks of unnecessary CD can influence patient decision-making and decrease CD rates. Keywords: Caesarian, Vaginal delivery, Preference, Mode of delivery.

Background: Low-lying placentas are positioned close to the internal os of the cervix. The preferred way of delivery within this group is unclear. Objectives: To review the literature on the success of a vaginal delivery with a low-lying placenta. Search strategy: We searched OVID EMBASE and MEDLINE for studies on vaginal delivery with a low-lying placenta. Data collection and analyses: Data was extracted on successful vaginal delivery and emergency caesarean section due to haemorrhage. We distinguished between different distances between the cervical os and the placenta (internal os distance, IOD); 0–10, 11–20, and >20 mm. A meta-analysis of proportions was made for successful vaginal delivery and emergency caesarean section at every cut-off value. Maternal morbidity (i.e. antepartum blood loss, postpartum haemorrhage and blood transfusion) at different cut-off values was evaluated. Main results: Of the 999 articles retrieved, 10 articles met our inclusion criteria. A vaginal delivery was successful at an IOD of 0–10 mm in 43%, at an IOD of 11–20 mm in 85%, and at an IOD of >20 mm in 82%. A shorter IOD had a higher chance of antepartum haemorrhage, whereas a larger IOD needed postpartum blood transfusion more often. Postpartum haemorrhage did not depend on IOD. Conclusion: A low-lying placenta is not a contraindication for a trial of labour, and the morbidity in these women is not increased. However, women with a low-lying placenta have a higher chance of an emergency caesarean section compared with women with a placenta outside the lower uterine segment. Therefore, shared decision-making is mandatory in case of a trial of labour. Tweetable abstract: This systematic review demonstrates the possibility of a vaginal delivery in women with a low-lying placenta within 20 mm of the cervix.

BACKGROUND Systematic approaches to information giving and decision support for women with previous caesarean sections are needed. AIM To evaluate decision support within a 'real-world' shared decision-making model. METHODS A pragmatic comparative effectiveness randomised trial in the Positive Birth After Caesarean Clinic. Women with one previous caesarean and singleton pregnancy

This study aimed to estimate the impact of third-trimester ultrasound with measurement of the lower uterine segment thickness (LUST) and estimation of fetal weight (EFW) on maternal and perinatal morbidity among women with a prior cesarean delivery.We performed a secondary analysis of the QUARISMA trial, including women who delivered at term after one prior cesarean delivery in tertiary care centres. Major and minor maternal and perinatal morbidities were compared between centres that had introduced LUST and EFW measurements into routine practice and those that had not, using generalised estimating equations and adjusted odds ratios (aOR). In a secondary analysis, we compared women who underwent a trial of labour with and without LUST and EFW measurements.We observed a significant reduction in major perinatal morbidity (aOR 0.52; 95% CI 0.28-0.96, P = 0.04), minor perinatal morbidity (aOR 0.49; 95% CI 0.25-0.96, P = 0.04), and minor maternal morbidity (aOR 0.56; 95% CI 0.34- 0.94, P = 0.03) but no significant difference in major maternal morbidity (aOR 0.40; 95% CI 0.04-3.69, P = 0.42) in the 2 centres that had introduced third-trimester ultrasound with EFW and LUST measurements (1458 women), compared with the 4 centres (1247 women) that had not. Among women who underwent a trial of labour, we observed a reduction in major perinatal morbidity (aOR 0.25; 95% CI 0.11-0.54, P0.001) and a lower rate of uterine rupture (0% vs. 0.3%, P = 0.045) with LUST and EFW measurements.Third-trimester ultrasound with EFW and LUST measurement is associated with a significant reduction in major perinatal morbidity in women with a prior cesarean delivery.

The aim of this study was to determine the main contributors to caesarean section (CS) rates at an Australian tertiary hospital. We conducted a retrospective review of women who delivered in an Australian tertiary hospital between 2014 and 2017. Women were allocated according to a modified Robson Ten-Group Classification System and CS indications were collected in nulliparous women and women with previous CS. The largest contributor to the 35.7% overall CS rate was women with a term cephalic infant and a previous CS (31.5% relative CS rate) and the most common indication was repeat CS. The group CS rate in nulliparous women with a cephalic term infant was higher when labour was induced compared to occurring spontaneously (36.6% and 18.1% respectively). The primary CS indication for these women was labour dystocia and maternal request was the most common CS indication for nulliparous women with a pre-labour CS.IMPACT STATEMENTWhat is already known on this subject? Significantly increasing caesarean section (CS) rates continue to prompt concern due to the associated neonatal and maternal risks. The World Health Organisation have endorsed the Robson Ten-Group Classification System to identify and analyse CS rate contributors.What do the results of this study add? We have used the modified Robson Ten-Group Classification System to identify that women with cephalic term infants who are nulliparous or who have had a previous CS are the largest contributors to overall CS rates. CS rates were higher in these nulliparous women if labour was induced compared to occurring spontaneously and the primary CS indication was labour dystocia. In nulliparous women with a CS prior to labour the most common CS indication was maternal request. Majority of women with a previous CS elected for a repeat CS.What are the implications of these findings for clinical practice? Future efforts should focus on minimising repeat CS in multiparous women and primary CS in nulliparous women. This may be achieved by redefining the definition of labour dystocia, exploring maternal request CS reasoning and critically evaluating induction timing and indication. Appropriately promoting a trial of labour in women with a previous CS in suitable candidates may reduce repeat CS incidence.

Development of anuria in the setting of post-caesarean section is a cause of concern for surgeons, and it requires rapid evaluation for detecting its possible etiology and the initiation of appropriate treatment. When the cause of anuria is not immediately apparent in a hemodynamically stable patient, one must rule out other possible differentials as part of the diagnostic process. In this report, we present a rare case of a patient undergoing a trial of labour after a caesarean section, who had a Foley catheter accidentally placed and inflated in the right ureter, instead of the bladder. This led to apparent anuria, which was not identified until the patient's caesarean section had been completed. We also seek to shed light on a method for safely removing a ureteral Foley with a blocked inflation channel.

Objective: to compare the vaginal birth rate in women with previous one lower segment caesarean section when induced at 40 weeks compared to expectant management till 41 weeks. Design: A randomized controlled trial Setting: Department of Obstetrics and Gynaecology, JIPMER, a tertiary care teaching institution in the south of India. Population or Sample: Low-risk women with previous one single lower segment caesarean section with a singleton foetus in vertex presentation and eligible for a trial of labour (TOLAC) at 40 weeks gestation. Methods: Block randomization to two groups of thirty each. The induction group was induced at 40 weeks with low dose oxytocin infusion or ripening with a single application of a single balloon Foley catheter followed by oxytocin infusion 24 hours later. The expectant group was managed in the hospital with maternal and foetal surveillance and induced at 41 weeks if they had not delivered by then. Main Outcome Measures: Vaginal birth after caesarean section (VBAC). Results: The demography and pregnancy variables were comparable in the two groups. Twenty out of thirty women (66.67%) had a successful vaginal birth after caesarean section in the induction group compared to ten out of 30 (33.33%) in the expectant group. This difference was significant (RR 2.0, 95% CI: 1.13-3.52; P=0.016) Conclusions: Among low-risk women with previous one lower segment caesarean section willing and eligible for TOLAC, the successful VBAC rate is significantly higher among those induced at 40 weeks compared to those managed expectantly till 41 weeks.

Antenatal factors that may predict successful vaginal birth after caesarean (VBAC) play a relevant role to select patients who could be candidate to a trial of labour after caesarean section (TOLAC). There is a relevant antenatal scoring system and a nomogram for prediction of vaginal birth after caesarean delivery. A nonrecurring indication for previous caesarean section (CS) is associated with a much higher successful VBAC rate than recurrent indications. Prior vaginal deliveries can be considered excellent prognostic indicators of successful VBAC. A low vertical uterine incision does not seem to adversely affect VBAC success rates as compared to a low transverse incision. Maternal obesity and diabetes mellitus adversely affect VBAC outcomes. Foetal macrosomia does not appear to be a contraindication to VBAC, as success rates exceeding 50% are achieved and uterine rupture rates are not increased. Success rates decrease when interval increases. Twin gestation does not preclude VBAC. Post-date pregnancies may deliver successfully by VBAC in greater than two-thirds of cases. Mechanical induction should be preferred in case of post-date pregnancy. Attempted VBAC will be successful in the majority of attempted cases.

OBJECTIVE To compare neonatal outcomes of women with a body mass index (BMI) of ≥35 kg/m2 who underwent a trial of labour with those of women who underwent a planned primary caesarean section (CS). DESIGN A retrospective cohort study of births between April 2012 and March 2014. SETTING A provincial database: Better Outcomes Registry & Network (BORN) Ontario, Canada. POPULATION A cohort of 8752 women with a BMI of ≥35 kg/m2 who had a singleton birth at 38-42 weeks of gestation. METHODS Neonatal outcomes were compared between women who underwent a trial of labour (with either a successful vaginal birth or intrapartum CS) and those who underwent a planned CS. MAIN OUTCOME MEASURE A composite of any of the following outcomes: intrapartum neonatal death, neonatal intensive care unit admission, 5-minute Apgar score of

Uterine rupture is a feared complication when a woman with a uterus scarred by a caesarean section (CS) is in labour. The increased awareness of the possibility of uterine rupture and dramatic consequences including perinatal asphyxia has lead to guidelines for management when undertaking a trial of labour after caesarean section Uterine rupture occurs in an estimated 35 per 10 000 women with a previous CS undergoing labour (INOSS study of uterine rupture, BJOG 2019;126:370-381), but is extremely rare before the onset of labour and in the unscarred uterus. Our knowledge of prelabour uterine rupture is confined merely to a small number of published case reports and case series in the literature.

Objective This quality improvement (QI) initiative was designed to identify gaps between evidence-based or hospital recommendations for trial of labour after cesarean delivery (TOLAC) labour management and clinical practice. Methods Viable, singleton pregnancies from January 1, 2016, to December 31, 2018, undergoing TOLAC were extracted from the electronic medical record. Sixty randomly selected charts were reviewed for (1) consent, (2) induction methods, (3) oxytocin use, (4) continuous fetal monitoring, (5) admission indication, (6) examination regularity, (7) duration of dystocia before decision to perform cesarean delivery (CD), and (8) maternal complications. Results The institutional vaginal birth after cesarean rate was 71%. Documented consent to TOLAC on admission was present in 50% of cases. Oxytocin augmentation was used in 38% of cases, and the median maximum dose was 4 mU/min (interquartile range [IQR] 3–7.5 mU/min). Delays in initiating oxytocin were identified in 47% of those patients. Decisions to deliver by cesarean were made after a median time of 5 hours and 40 minutes (IQR 3 hours and 30 minutes to 6 hours and 35 minutes) of failure to progress despite adequate contractions. After this decision, median time to delivery was 1 hour and 11 minutes (IQR 57 minutes to 2 hours and 16 minutes). Complications included postpartum hemorrhage (5%) and chorioamnionitis (6.7%). Surgical injury occurred in 10% of intrapartum CD. Peripartum complications were associated with delay in oxytocin implementation (χ2 (1) = 9.80; P Conclusion Areas for QI were identified in (1) consent, (2) duration of dystocia before decision to proceed with CD and delay to CD, and (3) peripartum complications. We recognize the potential use of this as a tool to identify areas for QI and prospective study.

Background Repeat caesarean sections (CSs) are major contributors to the high rate of CS in Canada and globally. Women’s decisions to have a planned repeat CS (PRCS) or a trial of labour after CS (TOLAC) are influenced by their maternity care providers. This study explored factors maternity care providers consider when counselling pregnant women with a previous CS, eligible for a TOLAC, about delivery method. Methods A qualitative descriptive design was implemented. Semi-structured, one-to-one in-depth telephone interviews were conducted with 39 maternity care providers in Ontario, Canada. Participants were recruited at 2 maternity care conferences and with the use of snowball sampling. Interviews were audio recorded and transcribed verbatim. Data were uploaded into the data management software, NVIVO 10.0 and analyzed using qualitative content analysis. Results Participants consisted of 12 obstetricians, 13 family physicians and 14 midwives. Emergent themes, reflecting the factors maternity care providers considered when counselling on mode of delivery, were organized under the categories clinical/patient factors, health system factors and provider preferences. Maternity care providers considered clinical/patient factors, including women’s choice … with conditions, their assessment of women’s chances of a successful TOLAC, their perception of women’s risk tolerance, women’s preferred delivery method, and their perception of women’s beliefs and attitudes about childbirth. Additionally, providers considered health system factors which included colleague support for TOLAC and time needed to mount an emergency CS. Finally, provider factors emerged as considerations when counselling. They included provider preference for PRCS or TOLAC, provider scope of practice, financial incentives and convenience related to PRCS, past experiences with TOLAC and PRCS and providers’ perspectives on risk of TOLAC. Conclusion The findings highlight the multiplicity of factors maternity care providers consider when counselling women. Effectively addressing clinical, health care system and personal factors that influence counselling may help decrease non-medically indicated PRCS.

Objectives: The purpose of this study was to determine the risk factors for caesarean sections in the second stage of labour after a previous caesarean section among women who underwent trial of labour (TOL). Material and methods: From a total of 639 women who experienced one caesarean section, 456 women were qualified for TOL. From this group, 105 women were subjected to a caesarean section in the first stage of labour and another 351 women reached the second stage of labour. From the latter group, 309 women delivered naturally and 42 were subjected to a caesarean section. Results: Risk factors for the necessity of performing a caesarean section in the second stage of labour after a previous caesarean section was the weight gain during pregnancy (OR = 1.07), the height of fundus uteri (OR = 1.25) before delivery, and the estimated foetal weight (OR = 1.01), a past delivery of a child with a birth weight exceeding 4.000 g (OR = 2.14), the presence of pre-gestational diabetes (OR = 15.4) and gestational diabetes (OR = 2.22), necessity of applying a delivery induction (OR = 2.52), stimulation of uterine activity during delivery (OR = 2.43) and application of epidural analgesia (OR = 4.04). A factor reducing the risk of a caesarean section in the second stage was a vaginal delivery in a woman’s history (OR = 0.21). Conclusions: Women should be encouraged to deliver naturally after a previous caesarean section, especially when their history includes a vaginal delivery and if there is no need for labour induction.

Objective To investigate the association of chorioamnionitis and its duration with adverse maternal outcomes by mode of delivery. Design A retrospective cohort study. Setting Data from the Consortium on Safe Labor Study in the USA (2002-2008). Population Singleton deliveries at ≥23 weeks of gestation (221 274 assessed deliveries, 62 331 by caesarean section). Methods The association of chorioamnionitis, and secondarily the duration of chorioamnionitis estimated from intrapartum antibiotic use, with adverse maternal outcomes was analysed using logistic regression with generalised estimating equations, adjusting for age, parity, race, pregestational diabetes, chronic hypertension, gestational age at delivery, study site and delivery year. Analyses were stratified by vaginal versus caesarean delivery. Main outcome measures The composite adverse maternal outcome included: postpartum transfusion, endometritis, wound/perineal infection/separation, venous thromboembolism, hysterectomy, admission to intensive care unit and/or death. Results Chorioamnionitis was associated with higher odds of the composite adverse maternal outcome with caesarean delivery (adjusted odds ratio 2.31; 95% CI 1.97-2.71); and the association persisted regardless of whether a woman had a trial of labour, preterm delivery or maternal group B streptococcus colonisation. The most common adverse outcomes after caesarean section were postpartum transfusion (56.0%) and wound/perineal infection or endometritis (38.6%). Chorioamnionitis was not associated with adverse maternal outcomes after vaginal delivery. The duration of chorioamnionitis as the exposure did not alter the association between chorioamnionitis and adverse maternal outcomes. Conclusions Chorioamnionitis, but not the estimated duration, was associated with increased odds of adverse maternal outcomes with caesarean delivery. This finding has implications for care programmes to prevent maternal morbidity after a caesarean section complicated by chorioamnionitis. Tweetable abstract Chorioamnionitis, but not its duration, increases the risk of adverse maternal outcomes with caesarean delivery.

Centres providing maternity care and offering a trial of labour after cesarean must develop and use maternal educational and consent processes that emphasize choice and autonomy related to options for and decisions surrounding vaginal birth after cesarean and elective repeat cesarean delivery. These centres should have administrative systems and processes that take into account local resources for cesarean delivery services, including team-based complex maternity risk support and an urgency consensus on the fetal, maternal, and maternal-fetal indications for a surgical delivery to ensure an appropriate decision-to-delivery interval.

Background: Trial of labour is a clinical test to assess the adequacy of pelvis andability of fetus and mother to withstand labour. If progressive changes in dilation and station donot occur, a cesarean delivery is performed. Objective: Feto-maternal outcome after trial oflabour in women with gestational age b/w 37 to 42 weeks. Study Design: Cross sectional study.Setting: Department of Obs/ Gyn unit-I Liaquat University Hospital Hyderabad. Duration ofStudy: One year from 01-02-2009 to 31-01-2010. Subjects and Methods: 100 pregnant women,with gestational age between 37-42 weeks, who underwent trial of labour at labour ward,Obs/Gyn Unit-1 Liaquat University Hospital, after fulfilling the inclusion criteria were included inthe study. Detailed history and examination including abdominal and pelvic examination as wellas Ultrasound for fetal well being was performed. Fetal monitoring was done by auscultation andCTG. Partogram was maintained to observe the progress of labour. Those who progressed withtrial either delivered normally or with the help of instruments and those who did not progress weredelivered by C-section. After delivery, mothers were watched for any postpartum complicationand condition of neonates was assessed by APGAR score. Results: Out of 100 women includedin this study 58% delivered vaginally, 31 % delivered by cesarean section and 11 % hadinstrumental deliveries. Labour was induced in 34%, augmented in 34% and 32% hadspontaneous labour. 77.0% babies had apgar score > 5(7.1±0.72), 16% < 5(3.68±2.18) and 6%were still birth. 81% mothers had no complication during or after delivery, whereas 19 developedcomplications and these were 12 Genital tract traumas, 5 postpartum haemorrhage, one uterinerupture and one retained placenta. There was no statistically significant difference (P=0.42)when mode of delivery was compared with the trial of labour. However augmentation of labourwas associated with increased rate of maternal complications when maternal outcome wascompared with the type of labour (P=0.03). Conclusions: Trial of labour in carefully selectedwomen with high probability to deliver their babies vaginally decreases the rate of LSCS, therebyreducing the maternal morbidity and mortality associated with it. However augmentation oflabour is associated with increased rate of maternal complications as compared to spontaneousor induced labour.

Objective Biomechanics of pelvic floor muscles is becoming an important field of research in understanding a complex process of labour. Current evidence indicates that the levator ani stretches to allow passage of the fetus through the birth canal. We sought to identify properties of the functional female pelvic floor during pregnancy that could help to predict the mode of delivery, especially in women who underwent caesarean section in the past. Methods A single centre prospective cohort study of pregnant women in the 3rd trimester attending antenatal clinic. Participants were categorised into three groups: 1. nulliparous, 2. previous one vaginal delivery and 3. previous one caesarean section who chose a trial of labour in their current pregnancy. All women underwent ultrasonographic evaluation of their pelvic floor muscles. Distensibility and the mode of delivery were assessed in participants’ current pregnancies. The primary outcome was the mode of delivery. ANOVA test was used for statistical analysis. Results 133 women were included: 55 nulliparous, 52 primiparous (previous one vaginal birth), and 26 primiparous (previous one LSCS and planned for vaginal delivery after caesarean (VBAC)). Participants were scanned at an average gestation of 32 weeks. The inter-observer reliability test for puborectalis distensibility was good (kappa 0.75). Overall, women who delivered vaginally had a more distensible puborectalis muscle than those who delivered by emergency LSCS regardless of their previous type of delivery. Women who underwent a successful VBAC had less distensible pelvic floor muscles compared to their nulliparous and primiparous counterparts (who delivered vaginally in the past). Conclusion These results support our basic conceptual theory of puborectalis muscle distensibility influencing the mode of delivery and endorse application of dynamic pelvic floor ultrasound in future studies. We identified measurable differences in the functional female pelvic anatomy aiding a better understanding of physiology of the labour. There are trends towards lesser distensibility in women who delivered by LSCS.

To compare the demographic and clinical characteristics between women who chose elective repeat Caesarean section (ERCS) versus trial of labour after Caesarean section (TOLAC) in St. John's, Newfoundland and Labrador (NL).We conducted a retrospective case control study of women with live singleton gestations delivering at term in St. John's, NL between January 1, 2001 and December 31, 2014. Inclusion criteria were women who had a previous single lower segment Caesarean section (LSCS). TOLAC, successful TOLAC, and VBAC rates were calculated. Demographic and clinical characteristics were compared between women who chose ERCS versus TOLAC. Univariate analyses and multiple logistic regression analyses were performed, and adjusted odds ratios (aOR) and 95% CIs were calculated.A total of 1579 women were included, of whom 160 (10.1%) chose TOLAC, with 107 resulting in successful VBAC (67% successful TOLAC rate). The overall VBAC rate was 6.8%. Women who chose ERCS compared with those who chose TOLAC were more likely to be obese (aOR 3.20, 95% CI 1.85-5.54, P 0.001), less likely to have had GA at delivery greater than 40 weeks (aOR 0.13, 95% CI 0.08-0.21, P 0.001), less likely to have had a previous vaginal delivery (aOR 0.40, 95% CI 0.20-0.80, P 0.001), and less likely to have had the previous CS for breech presentation (aOR 0.51, 95% CI 0.33-0.80, P = 0.003).The overall TOLAC and VBAC rates in St. John's are low when compared with reported national rates. The successful TOLAC rate is within the expected range reported in the literature. Differences exist between women who chose ERCS compared with TOLAC.

Background: The alarming increase in caesarean section rates worldwide has led to a shift of focus to caesarean section rates and indications for caesarean section. The main objective of the study was to analyse the indications for caesarean section with the aim of finding viable interventions which could help decrease the caesarean rates. Methods: A retrospective study from 1st January 2017 to 31st December 2017 was conducted in which we analysed patient records of those delivering in unit III of our institute. Analysis of patient records was done and indication for caesarean was analysed. Results: A total of 496 women delivered in our unit in 2017, of these, 303 (61.09%) had a vaginal delivery and 193 (38.91%) had caesarean section. 108 patients (21.77%) had a history of at least one previous caesarean section and of these 94 (87.03%) underwent a repeat caesarean section. The primary caesarean section rate was 25.51%. Section was done for breech presentation in eleven primigravidae (5.7% of sections) and in fifteen multigravidae (7.77% of sections) including those with a previous section. Four patients had multiple pregnancy (2.04% of all sections). Eleven patients had a preterm section (5.7% of sections). Conclusion: In order to decrease caesarean rates the group that requires most focus is those in whom a primary section is being done. Few patients who have undergone at least one prior surgery are willing to take the risk inherent to a trial of labour (TOLAC). Classification and reporting of caesarean section according to the Robson ten point criteria will help in a better understanding of the indication, comparison and auditing and help to establish guidelines that can help decrease the caesarean rates.

Objective To explore nulliparous women's perceptions of decision making regarding mode of delivery under China's two-child policy. Design Qualitative descriptive design with in-depth semi-structured interviews. Setting Postnatal wards at a tertiary specialized women's hospital in Shanghai, China. Participants 21 nulliparous women 2–3 days postpartum were purposively sampled until data saturation. Methods In-depth semi-structured interviews were conducted between October 8th, 2015 and January 31st, 2016. Results Two overarching descriptive categories were identified: (1) women's decision-making process: stability versus variability, and (2) factors affecting decision making: variety versus interactivity. Four key themes emerged from each category: (1) initial decision making with certainty: anticipated trial of labour, failed trial of labour, ‘shy away' and compromise, anticipated caesarean delivery; (2) initial decision making with uncertainty: anticipated trial of labour, failed trial of labour, ‘shy away' and compromise; (3) internal factors affecting decision making: knowledge and attitude, and childbirth self-efficacy; and (4) external factors affecting decision making: social support, and the situational environment. Conclusion and implications for practice At the initial period of China's two-child policy, nulliparous women have perceived their decision-making process regarding mode of delivery as one with complexity and uncertainty, influenced by both internal and external factors. This may have implications for the obstetric setting to develop a well-designed decision support system for pregnant women during the entire pregnancy periods. And it is recommended that care providers should assess women's preferences for mode of delivery from early pregnancy and provide adequate perinatal support and continuity of care for them.

Objective To determine the proportion of women in Robson group 5 (RG5) who were eligible for a trial of labour after Caesarean (TOLAC) and, among eligible candidates, identify determinants of having a TOLAC and subsequent vaginal delivery (VD). Methods This population-based cohort study used data derived from the Nova Scotia Atlee Perinatal Database. Deliveries from 1998–2014 to women in RG5 (≥1 previous CS with a singleton term cephalic fetus) were included. Eligibility for a TOLAC was based on SOGC criteria. Multivariable logistic regression was used to identify characteristics independently associated with TOLAC and VD. The characteristics associated with VD were used in a logistic model to predict the theoretical probability of VD in women who did not have a TOLAC. Results Of the 15 111 deliveries in RG5, 75.3% were by CS. Of the 14 763 eligible women, 5488 (37.2%) had a TOLAC, of which 3739 (68.1%) resulted in VD. Predictors of VD included high area–level income and either a CS without labour or a spontaneous VD in the preceding pregnancy. While mode of previous delivery also predicted TOLAC among eligible women, high area–level income was associated with reduced odds of TOLAC. The probability of VD in women who did not undergo TOLAC was estimated to be 47.1%, and the lowest CS rate attainable in RG5 was estimated at 46.3%. Conclusions Sociodemographic factors such as income and previous mode of delivery were associated with the rates of TOLAC and subsequent VD in eligible women, and suggest that the Caesarean section rate in RG5 could be safely reduced.

Background Following a primary caesarean section (CS), women must decide between attempted vaginal birth after caesarean (VBAC) and elective repeat caesarean section (ERCS) in subsequent pregnancies. Both options carry potential morbidity and mortality for mother and child, with the most feared being uterine rupture and its consequences. In attempts to reduce morbidity, several predictive nomograms have been developed to assist in delivery mode decisions. Aim To assess the validity of the predictive nomogram developed by Grobman et al. in our regional Australian population. Materials and methods In our retrospective analysis, patients at term, with one previous CS who had a trial of labour were assigned a 'Grobman score' based on antenatal details. Outcomes were noted and patient groups analysed according to percentage deciles of estimated VBAC success, compared with actual VBAC success rates. Results A total of 395 women underwent trial of labour after a single prior CS, with a VBAC success rate of 83%. The Grobman model displayed adequate calibration and the re-calibrated model good calibration with the slope coefficient of 0.87 (95% CI 0.54-1.19) and intercept 0.19 (95% CI -0.34-0.72). Discrimination was moderate with receiver operating characteristic area of 0.71 (95% CI 0.67-0.76). Conclusion This analysis supports further validation studies in larger Australian settings, and suggests that use of the original Grobman predictive nomogram may be appropriate in Australia.

Objective To provide evidence-based guidelines for the provision of a trial of labour (TOL) after Caesarean section. Outcome Fetal and maternal morbidity and mortality associated with vaginal birth after Caesarean (VBAC) and repeat Caesarean section. Evidence MEDLINE database was searched for articles published from January 1, 1995, to February 28, 2004, using the key words "vaginal birth after Caesarean (Cesarean) section." The quality of evidence is described using the Evaluation of Evidence criteria outlined in the Report of the Canadian Task Force on the Periodic Health Exam. Recommendations 1.Provided there are no contraindications, a woman with 1 previous transverse low-segment Caesarean section should be offered a trial of labour (TOL) with appropriate discussion of maternal and perinatal risks and benefits. The process of informed consent with appropriate documentation should be an important part of the birth plan in a woman with a previous Caesarean section (II-2B). 2.The intention of a woman undergoing a TOL after Caesarean section should be clearly stated, and documentation of the previous uterine scar should be clearly marked on the prenatal record (II-2B). 3.For a safe labour after Caesarean section, a woman should deliver in a hospital where a timely Caesarean section is available. The woman and her health care provider must be aware of the hospital resources and the availability of obstetric, anesthetic, pediatric, and operating-room staff (II-2A). 4.Each hospital should have a written policy in place regarding the notification and (or) consultation for the physicians responsible for a possible timely Caesarean section (III-B). 5.In the case of a TOL after Caesarean, an urgent laparotomy should be set-up immediately to facilitate delivery as quickly as possible (III-C). 6.Continuous electronic fetal monitoring of women attempting a TOL after Caesarean section is recommended (II-2A). 7.Suspected uterine rupture requires urgent attention and expedited laparotomy to attempt to decrease maternal and perinatal morbidity and mortality (II-2A). 8.Oxytocin augmentation is not contraindicated in women undergoing a TOL after Caesarean section (II-2A). 9.Medical induction of labour with oxytocin may be associated with an increased risk of uterine rupture and should be used carefully after appropriate counselling (II-2B). 10.Medical induction of labour with prostaglandin E2 (dinoprostone) is associated with an increased risk of uterine rupture and should not be used except in rare circumstances and after appropriate counselling (II-2B). 11.Prostaglandin E1 (misoprostol) is associated with a high risk of uterine rupture and should not be used as part of a TOL after Caesarean section (II-2A). 12.A Foley catheter may be safely used to ripen the cervix in a woman planning a TOL after Caesarean section (II-2A). 13.The available data suggest that a trial of labour in women with more than 1 previous Caesarean section is likely to be successful but is associated with a higher risk of uterine rupture (II-2B). 14.Multiple gestation is not a contraindication to TOL after Caesarean section (II-2B). 15.Diabetes mellitus is not a contraindication to TOL after Caesarean section (II-2B). 16.Suspected fetal macrosomia is not a contraindication to TOL after Caesarean section (II-2B). 17.Women delivering within 18 months of a Caesarean section should be counselled about an increased risk of uterine rupture in labour (II-2B). 18.Postdatism is not a contraindication to a TOL after Caesarean section (II-2B). 19.Every effort should be made to obtain the previous Caesarean section operative report to determine the type of uterine incision used. In situations where the scar is unknown, information concerning the circumstances of the previous delivery is helpful in determining the likelihood of a low transverse incision. If the likelihood of a lower transverse incision is high, a TOL after Caesarean section can be offered (II-2B). Validation These guidelines were approved by the Clinical Practice Obstetrics and Executive Committees of the Society of Obstetricians and Gynaecologists of Canada.

In this issue, Hautakangas et al report that "we found significantly lower intrauterine pressure (IUP) in failed Trial Of Labour After Caesarean (TOLAC), compared with Vaginal Birth After Caesarean", although "the dosages of oxytocin tended to be higher among failed TOLACs". They commented that "it seems that raising the oxytocin dosage does not necessarily improve uterine contractile activity in this group". Why is this?

Background: Trial of labour after Caesarean section (TOLAC) refers to an attempt at vaginal delivery after a previous caesarean section. Outcome is influenced by a number of factors which are important in patient’s selection. Objectives: The aim of this study was to find out the incidence and feto-maternal outcome of the practice of Trial of labour after Caesarean section. Methodology: This is a retrospective study of cases of vaginal birth after Caesarean section Data were retrieved from the case notes of patients who attempted vaginal birth after Caesarean section from January 1, 2013 to December 31, 2017, a period of five years. Result: There were 10,669 deliveries, 3179 of which were through Caesarean section. This gave a Caesarean section rate of 29.8%. A total of 217 patients attempted vaginal birth after Caesarean section and 83 ended up as repeat Caesarean section (38.2%) while 138 (61.8%) had successful vaginal birth after Caesarean section. Patients with previous vaginal delivery, age range 25 - 29 years and interdelivery interval of greater than or equal to 2 years were more successful at achieving vaginal birth after Caesarean section. The leading indications for the repeat Caesarean section include cephalopelvic disproportion (45.8%), poor progress of labour (19.3%) and hypertensive disorders of pregnancy (8.4%). Conclusion: Vaginal birth after Caesarean section was successful in most of the parturients that attempted it in this study especially in patients within the age range of 25 - 29 years, those that have had previous vaginal delivery and with interdelivery interval of greater than or equal to 2 years.

Background Counselling women for and managing birth after caesarean section are important. Research is needed on evaluation of antenatal factors that predict likelihood of successful trial of labour after caesarean section (TOLAC). Aim To evaluate the effect of gestational weight gain on mode of delivery in women having TOLAC. Materials and methods A retrospective cohort study of eligible women who underwent TOLAC (January 2012 to July 2015) at a large urban hospital. Gestational weight gain was classified as ‘excessive’ or ‘not excessive’ based on calculated pre-pregnancy body mass index. Multivariable logistic regression analysis was performed to estimate the association of gestational weight gain and vaginal birth, adjusting for socio-demographic and pregnancy-related factors. Results Of 534 women, those who gained excessive weight were less likely to have a vaginal birth as women who did not (adjusted odds ratio (aOR) 0.48, 95% confidence interval (CI) 0.29–0.81)). Women with previous vaginal birth were more likely to have a vaginal birth (aOR 3.74, 95% CI 1.90–7.36), while women ≥35, women who had an epidural, and women who delivered at 40 weeks, were less likely (aOR 0.58, 95% CI 0.35–0.97, aOR 0.12, 95% CI 0.07–0.22, and aOR 0.53, 95% CI 0.31–0.91, respectively). Conclusions Gaining excessive weight in pregnancy is potentially modifiable, and can be incorporated into individual antenatal counselling, and into risk prediction models, to assist with informed decision making around planned mode of delivery in women with previous caesarean section. Future research could focus on interventions to reduce gestational weight gain in women planning TOLAC.

Objective: Our quantitative analysis examined what factors influence pregnant women to choose a vaginal birth after a caesarean (VBAC).Background: There is growing concern over the high rates of caesarean section; much of the high rate is driven by repeat caesareans. A trial of labour after a previous caesarean is an option for many women increasingly supported by medical literature.Methods: Survey data from 173 pregnant women who had had only one birth by caesarean were analysed using a hierarchical binary logistic regression model.Results: Desire for the experience of a vaginal birth strongly predicted choice of VBAC; however, this relationship was dampened among women with a high (versus low) powerful others (e.g. doctors and nurses) locus of control. Prior reason for a caesarean section and practical factors also play a role.Conclusion: Women may be more likely to choose VBAC if they are encouraged to believe that they can help control the outcome, especially if their desire for a vaginal birt...

Polyhydramnios is associated with an increased risk of cesarean section. The aetiology of polyhydramnios and the characteristics of the labour may be confounding factors. The objective was to study the characteristics and mode of delivery in case of pregnancy complicated with idiopathic polyhydramnios.This retrospective matched and controlled study included all pregnant women with idiopathic polyhydramnios (amniotic index25cm or single deepest pocket8cm) diagnosed at the 2nd or 3rd trimester and persistent at term delivery (37weeks of pregnancy) in our institution. We excluded pregnancies in which the polyhydramnios could be explained by infection, gestational diabetes, congenital malformation, abnormal karyotype, placental anomalies, alloimmunization as well as pregnancies in which an amniocentesis for the purpose of diagnosis had not been performed. Data were gathered from a tertiary care university hospital register from 1998-2015. Cases of polyhydramnios were matched with the following two women who presented for labour management with spontaneous cephalic presentation, matching for delivery date, maternal age, parity, body mass index. The main outcome measure was the risk of cesarean section. Univariate and multivariate adjusted analysis were performed.We identified 108 women with idiopathic polyhydramnios and compared them with 216 matched women. Among them, 94 and 188 attempted a trial of labour. Maternal age, mean term delivery and birthweight were 31 years, 39+5weeks gestation and 3550 g. We did not observe differences in maternal characteristics, epidural analgesia and rate of abnormal fetal heart tracing. Induced labour and non-vertex presentations (forehead, bregma, face) were more frequent in the polyhydramnios group (respectively 57.9% versus 27.8%, P0.05 and 7.8% versus 1%, P0.05). Cesarean section rate was higher in the case of polyhydramnios in the overall population (45.4% versus 8%, P0.05) and remained higher after exclusion of cases of induced labour and non-vertex presentation (38.4% versus 3.8%, P0.05). Amniotomy was more frequent in pregnancies with polyhydramnios (55.8% versus 39.1%, P0.05). After adjustment for matching and confounding variables, polyhydramnios was found to be a risk factor for cesarean section (OR 21.02; CI 95% 8.004-55.215, P0.01).Idiopathic polyhydramnios increased the risk of prolonged first stage of labour, non-vertex presentation and cesarean section.