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Striae gravidarum are linear atrophic scars appearing on the abdomen of pregnant women reported to be related to pregnancy-induced changes in the connective tissue. Pelvic floor distress symptoms are also known to be linked to connective tissue weakness. Given that common pathophysiological pathways may play a role in both striae gravidarum and pelvic floor dysfunction symptoms, we sought to examine whether there is a correlation between them during pregnancy.A prospective observational study among third-trimester pregnant women who visited a tertiary medical center for routine pregnancy follow-up was conducted by using the Pelvic Floor Distress Inventory (PFDI-20) questionnaire to evaluate pelvic floor distress symptoms and the Davey method for evaluating striae gravidarum severity. Obstetrical characteristics as well as pelvic floor distress symptoms were compared between two groups according to the severity of striae gravidarum. Univariate analysis was carried out using appropriate tests; PFDI scores were compared between the groups using the Mann-Whitney test.Women with striae gravidarum were significantly older (31.06 vs. 28.83 years, p0.01), had a lower body mass index (27.5 vs. 30.98, p0.01), and gave birth to smaller neonates (3155 vs. 3389 g, p0.01). In addition, the overall and median PFDI-20 scores differed between the groups (with severe SG having the highest median score of 20 and those with milder SG having a score of 16 compared to 14 in those without SG). A distinct association between the PFDI-20 score and SG severity was not demonstrated (p = 0.63).In our population, an association was demonstrated between pelvic floor distress symptoms and the presence of striae gravidarum. However, following a linear regression model, no statistically significant association between SG severity and total PFD-20 score was seen. Our findings strengthen the hypothesis of common connective tissue involvement in the pathophysiology of both conditions.

Prolactin (PRL)-secreting tumors are the most common functional pituitary adenomas. They usually respond to dopamine agonist (DA) treatment, with PRL normalization and adenoma shrinkage. Our aim was to characterize patients with prolactinoma resistant to DA treatment.This retrospective case series included patients diagnosed with DA-resistant prolactinomas between 1993-2017 in three medical centers. Resistance was defined as PRL levels above three times the upper limit of normal (ULN) despite a weekly dose of ≥2 mg cabergoline (CAB). Clinical and biochemical information, and response to treatment, were retrieved from medical records.Twenty-six patients were identified; 20 males. Of 25 macroadenomas, three were giant tumors (40 mm) and 15 (57.7%) were invasive. The mean age at diagnosis was 31.8 ± 14.9 years (range: 13-62). The median maximal CAB dose was 3.5 mg/week (IQR, 2.5-5). Half the patients received only CAB in escalating doses, nine received CAB and underwent transsphenoidal surgery, and four underwent surgery and radiotherapy in addition to CAB treatment. PRL levels at baseline between patients treated only with CAB and those operated were (91.6 [51.1-296.7] vs. 73.1 [22.6-170.9] XULN p = 0.355), and under maximal CAB dose PRL levels between patients treated only with CAB and those operated were similar (5.77 [1.27-11.27] vs 5.27 (2.9-26) XULN p = 0.317). At the last visit patients who received combined therapy achieved lower PRL levels than those treated with DA only (5.22 [1.7-21.6] vs 1.1 [0.44-3.99] XULN p = 0.017) PRL normalization was attained in seven patients and levels below 3 × ULN in fourteen patients; the overall response was 56%.Resistant prolactinomas usually require a multi-modal treatment strategy. We were able to control 14/25 (56%) of resistant tumors.

Pregnancy and delivery have a major effect on pelvic floor disorders. Assessing knowledge regarding pelvic floor disorders in childbearing age women and appropriate interventions will enable women to seek appropriate medical advice once pelvic floor disorders have developed. The purpose of this study was to validate the prolapse and incontinence knowledge questionnaire in the Hebrew language.Translation of the prolapse and incontinence knowledge questionnaire to the Hebrew language according to international recommended guidelines. A study was conducted to validate the questionnaire. The study took place between June to September 2020 in a tertiary medical center in Israel. A total of 240 third trimester pregnant women completed the Hebrew version of the prolapse and incontinence knowledge questionnaire. Construct validity, criterion validity and reliability tests were performed.Factor analysis of the Hebrew version of the prolapse and incontinence knowledge questionnaire demonstrated 12 strong positive factor loadings to one principal factor in the prolapse and incontinence knowledge questionnaire-pelvic organ prolapse domain (FL 0.3) and 10/12 in the prolapse and incontinence knowledge questionnaire-urinary incontinence domain. The Hebrew prolapse and incontinence knowledge questionnaire was found to have internal consistency, with Cronbach alpha coefficient of 0.745 for the urinary incontinence domain and 0.796 for the pelvic organ prolapse domain.The Hebrew version of the prolapse and incontinence knowledge questionnaire is a new, reliable, consistent, and valid instrument to examine the level of knowledge regarding pelvic floor disorders in Hebrew-speaking pregnant women.

Pregnancy and mode of delivery have a major effect on pelvic floor disorders (PFD). Assessing knowledge regarding PFD is essential not only for making more informed decisions regarding mode of delivery, but also for seeking help when PFD appear. The Prolapse and Incontinence Knowledge Questionnaire (PIKQ) is a validated tool that assesses women's knowledge regarding urinary incontinence (UI) and pelvic organ prolapse (POP). Validation of the Arabic version of the PIKQ had never been carried out. The purpose of this study was to conduct a condition specific validation among parturients of the PIKQ in the Arabic language.Translation of the PIKQ to the Arabic language was carried out according to international recommended guidelines. A cross-sectional study of pregnant women was conducted from June to September 2020 at the Soroka University Medical Center, Israel. The recommended 10:1 ratio between the number of subjects and the number of items in the questionnaire (n=24) was maintained. A total of 244 third trimester pregnant women have completed the Arabic version of the PIKQ. In addition to the validation of the psychometric characteristics, construct validity, criterion validity, and reliability were tested as well.Initially, exploratory factor analysis (EFA) was conducted, resulting in two 12-item scales representing UI and POP. Then, to validate the scale construct we conducted confirmatory factor analysis (CFA). Results of the CFA demonstrated that the PIKQ displayed construct validity, with standardized factor loadings ranging from 0.30 to 0.62. Finally, Cronbach's alpha indicated a good internal reliability for the two factors UI and POP. Criterion validity further supported the validity of the scale.The Arabic version of the PIKQ is a new, reliable, consistent, and valid instrument to examine the level of knowledge regarding UI and POP in Arabic speaking pregnant women. This instrument may be used to assess women's knowledge about PFD and to direct the need for educational interventions that may empower women to make informed decisions regarding perinatal care.

Background Treatment of paediatric trauma requires specialized infrastructure, medical equipment, medical staff and ancillary support personnel that have been specifically trained for such tasks. Aims and objectives To examine the perceptions and attitudes of physicians and nurses in general and paediatric emergency departments (PEDs) on training, confidence, and management of paediatric trauma in order to facilitate the establishment of an optimal model for admitting and treating paediatric trauma patients. Design Drawing on published literature and a previously conducted qualitative study that explored the provision of medical care to paediatric trauma patients, we conducted an attitude survey. Methods A 26-item paper-based questionnaire was distributed by nurse managers to all staff working within general EDs and PEDs of 22 medical centres across Israel. Results Of 843 physicians and nurses who completed the survey, 61.1% considered PEDs the most appropriate facility for treating both minor and severe paediatric trauma, 88.5% believed that minor paediatric trauma should be treated in designated paediatric trauma centres, and 53.6% deemed that paediatric emergency medicine specialists are the most suitable primary decision makers in paediatric trauma. PED teams expressed greater professional confidence for treating paediatric trauma and multiple casualty incident patients. Greater professional confidence was positively correlated with paediatric trauma training, greater exposure to paediatric trauma cases, and working in larger medical centres. Conclusions The results of the current study suggest that PEDs are perceived to be more appropriate for dealing with paediatric trauma. Also, treatment of severe trauma may be more appropriate in centres that admit large numbers of paediatric trauma cases. Relevance to clinical practice Emergency medicine teams should undergo training for dealing with paediatric trauma. Such training would develop their skills, increase their confidence, and enhance their emotional abilities to cope with paediatric trauma.

The objective was to examine knowledge regarding pelvic floor disorders (PFDs) among women during the third trimester of pregnancy.A cross-sectional study was conducted at a large teaching medical center in Israel between June and September 2020. Women in their third trimester (N = 649) were asked to complete the validated Hebrew and Arabic versions of the Prolapse and Incontinence Knowledge Questionnaire (PIKQ). The PIKQ instrument examines the knowledge of two major PFDs: urinary incontinence (UI) and pelvic organ prolapse (POP). The study population included women over 18 years of age, in the third trimester, who speak and read Hebrew or Arabic fluently. Two separate scores were calculated, one for each section of the PIKQ. The association of questionnaire scores with the different independent variables was examined using Student's t test or one-way ANOVA. Correlations were examined using Pearson's or Spearman's correlation coefficient.The Hebrew version was filled out by 405 women, and 244 women completed the Arabic version. The average questionnaire scores were 7.65 ± 2.8 and 5.32 ± 2 for the UI and POP sections respectively. Significantly higher average scores in both the UI and the POP sections were noted among health care workers (UI: 10.19 ± 2.3 vs 7.34 ± 2.6, p 0.001; POP: 8.27 ± 2.7 vs 4.97 ± 2.6, p 0.001), women with higher education (p 0.001 in both parts) and those with higher incomes (p 0.001 for both parts).Knowledge of PFD among women in the third trimester of pregnancy in Israel was found to be low. Founding educational programs for targeted groups may improve both the knowledge of PFD and the quality of life for these women.

Diabetic ketoacidosis (DKA) during pregnancy is a life-threatening emergency for both the mother and the fetus. The pathophysiology of DKA in pregnancy has its own characteristics due to multiple factors, such as insulin resistance, accelerated starvation and respiratory alkalosis, thus creating ketosis-prone state, with DKA occurring at milder degrees of hyperglycemia, even in normoglycemic levels, which can result in delayed diagnosis and treatment with potential for adverse metabolic consequences.In this article, we presented 8 clinical cases of DKA during pregnancy. We discuss the spectrum of the clinical picture, the entity of euglycemic DKA vs hyperglycemic DKA, the period of pregnancy in appearance of episode of DKA and triggers of DKA.The treatment of DKA in pregnant women must be started immediately and must be accentuated on intravenous fluids, insulin and electrolyte replacement. DKA in pregnancy may be euglycemic. Prevention, early recognition, immediate hospitalization, and aggressive management remain the cornerstones in DKA management in pregnancy.

Euglycemic DKA (eu-DKA) is a life-threatening emergency. It may occur in patients with both type 1 and type 2 DM, and characterized by milder degrees of hyperglycemia with blood glucose level 200 mg/dl, which can result in delayed diagnosis and treatment with potential for adverse metabolic consequences. Following the wide introduction of the sodium glucose transporter 2 inhibitors (SGLT2i) in therapeutic practice for DM type 2 treatment the amount of eu-DKA increased and therefore, interest to this entity rose. Other causes associated with eu-DKA include pregnancy, decreased caloric intake, heavy alcohol use, insulin use prior to hospital admission, cocaine abuse, pancreatitis, sepsis, chronic liver disease and liver cirrhosis. Patients with eu-DKA as well as with DKA need immediate referral for emergency evaluation and treatment. The treatment includes rapid correction of dehydration, correction electrolyte abnormalities, and use of insulin drip until the anion gap, and bicarbonate levels normalize. Increased glucose administration using higher percentages of dextrose (10 or 20%) are required to facilitate the concomitant administration of the relatively large amounts of insulin that are needed to correct the severe acidosis in these patients.

Objective Previous studies suggested maternal hypothyroidism during pregnancy to be associated with cognitive impairment of the offspring. Scarce data exist regarding long-term endocrine health of the offspring. This study was aimed to assess whether children born to mothers with hypothyroidism during pregnancy are at an increased risk for long-term endocrine morbidity. Study Design A retrospective population-based cohort study compared long-term endocrine morbidity of children born between the years 1991 and 2014 to mothers with and without hypothyroidism. Multiple gestations, fetuses with congenital malformations, and women lacking prenatal care were excluded. Hospitalizations of the offspring up to the age of 18 years involving endocrine morbidity were evaluated according to a predefined set of ICD-9 codes. Kaplan–Meier's survival curves were used to compare the cumulative risk and a Cox multivariable model was used to adjust for confounders. Results During the study period, 217,910 deliveries met the inclusion criteria; 1.1% of which were with maternal hypothyroidism (n = 2,403). During the follow-up period, the cumulative incidence of endocrine morbidity among children born to mothers with hypothyroidism was 27 per 1,000 person-years and 0.47 per 1,000 person-years in the comparison group (relative risk: 2.14; 95% confidence interval [CI]: 1.21–3.79). The Kaplan–Meier's survival curve demonstrated a significantly higher cumulative endocrine morbidity in children born to mothers with hypothyroidism (log-rank test, p = 0.007). In the Cox regression model controlled for maternal age, birth weight, preterm birth, maternal diabetes, hypertensive disorders of pregnancy, induction of labor, and mode of delivery, maternal hypothyroidism was found to be independently associated with pediatric endocrine morbidity in the offspring (adjusted hazard ratio = 1.92, 95% CI: 1.08–3.4, p = 0.025). Conclusion Maternal hypothyroidism appears to be independently associated with long-term pediatric endocrine morbidity of the offspring.

An over-active bladder is a common disorder which influences women's health and quality of life. There is difficulty defining the exact prevalence of the disorder since there are various definitions in the literature. The ICS definition from 2002 on the over-active bladder (OAB) syndrome enables more uniformity, by declaring that OAB syndrome is a symptomatic syndrome defined as presence of urgency with or without urinary incontinence, mostly accompanied by frequency and nocturia. In this article we reviewed the current medical literature on the prevalence of the OAB syndrome by focusing on relevant crosssectional and longitudinal studies, the trend changes during life, co-morbidities, the influence of quality of life and the economic burden following the disorder and its treatment. The authors' hope is that elevating awareness of the OAB syndrome will help improve its diagnosis and treatment.

To examine the effect of magnesium sulfate (MgSO(4)) on sFlt (soluble fms-like tyrosine kinase)-1 in the fetal and maternal compartments of normotensive and preeclamptic placentas.Cotyledons of term normotensive and preeclamptic placentas were dually perfused for six hours, with control medium and MgSO(4) (6-7 mg %) in the maternal reservoir. Perfusate sFlt-1 concentrations were measured.Median sFlt-1 concentration was higher in the maternal than in the fetal side in both groups and perfusion media (p0.0001). When perfused with control medium, the maternal side median sFlt-1 concentration was higher in the preeclampsia than in the control group (p0.0001). After perfusion with MgSO(4), the median maternal and fetal sides perfusate sFlt-1 concentration were higher in the preeclampsia than in the control group (p0.0001). In comparison to perfusion with control medium, the median sFlt-1 concentration of normal pregnant women decreased in the fetal and increased in the maternal side. In the preeclampsia group, only median fetal side sFlt-1 concentration increased.In contrast to normal pregnant women, perfusion with MgSO(4) of preeclamptic placentas did not increase their sFlt-1 concentration. This may indicate that MgSO(4) role may be limited to its anti-eclamptic and does not affect the anti-angiogenic state associated with preeclampsia.

article i nfo Cesarean delivery Fetal complication Obstetric complication Risk factor Uterine rupture Uterine scar dehiscence Objective: To determine whether women with a previous uterine scar dehiscence are at increased risk of adverse perinatal outcomes in the following delivery. Methods: A retrospective cohort study was conducted of all subsequent singleton cesarean deliveries performed at the Soroka University Medical Center, Beer-Sheva, Israel, between January 1, 1988, and December 31, 2011. Clinical and demographic characteristics, maternal obstetric complications, and fetal complications were evaluated among women with or without a previous documented uterine scar dehiscence. Results: Of the 5635 pregnancies associated with at least two previous cesarean deliveries, 180 (3.2%) occurred among women with a previous uterine scar dehiscence. Women with this condition in a prior pregnancy were more likely than those without previous uterine scar dehiscence to experience subsequent preterm delivery (86 (47.8%) vs 1350 (24.7%); P b 0.001), low birth weight (47 (26.1%) vs861(15.8%);Pb 0.001),andperipartumhysterectomy(5(2.8%)vs20(0.4%);Pb 0.001).Nevertheless,previous uterine scar dehiscence did not increase the risk of uterine rupture, placenta accreta, or adverse perinatal out- comes, such as low Apgar scores at 5 minutes and perinatal mortality. Conclusion: Uterine scar dehiscence in a previouspregnancyisapotentialriskfactorforpretermdelivery,lowbirthweight,andperipartumhysterectomy

To evaluate the effect of magnesium sulfate (MgSO(4)) on placental expression levels of vascular endothelial growth factor (VEGF).Cotyledons of term normotensive and preeclamptic placentas were dually perfused for 6 h, with MgSO(4) (6-7 mg%) in the maternal reservoir [normotensive (n = 3); preeclamptic (n = 4)] and with the control medium (without MgSO(4)) [normotensive (n = 3); preeclamptic (n = 6)]. After perfusion, placental tissue samples were collected from four different placental compartments (amnion, chorion, placental villous and decidua). The collected placental tissues were homogenized and examined for VEGF by ELISA. Statistical significance was determined using a two-way analysis of variance.After perfusion with control medium, significantly lower levels of VEGF were detected in the chorion and placental villous compartments of preeclamptic placentas (70 ± 24 pg/g protein and 29 ± 11 pg/g protein; respectively), as compared with normotensive placentas (172 ± 80 pg/g protein and 51 ± 17 pg/g protein; respectively; p 0.05). Exposure of preeclamptic placentas to MgSO(4) resulted in decreased VEGF levels by the amnion (57 ± 26 pg/g protein), as compared with the control group (153 ± 62 pg/g protein) (p 0.05). On the other hand, MgSO(4) significantly increased VEGF levels by the placental villous and the decidua (58 ± 15 pg/g protein, 70 ± 29 pg/g protein; respectively), as compared with the control group (29 ± 11 pg/g protein, 33 ± 14 pg/g protein; respectively) (p 0.01, p 0.05; respectively). Exposure to MgSO(4) did not affect VEGF levels in normotensive placentas.Reduced levels of VEGF are expressed by some placental compartments in preeclampsia compared with normotensive pregnancy. Perfusion with MgSO(4) affects VEGF expression differently by preeclamptic and normotensive placentas. Increased production of placental VEGF in preeclampsia may play a role in the therapeutic action of MgSO(4).

Drugs of abuse affect pregnancy outcomes, however, the mechanisms in which cannabis exerts its effects are not well understood. The aim of this study was to examine the influence of short-term (1-2 hours) exposure to cannabidiol, a major phytocannabinoid, on human placental breast cancer resistance protein function.The in vitro effect of short-term exposure to cannabidoil on breast cancer resistance protein in BeWo and Jar cells (MCF7/P-gp cells were used for comparison) was tested with mitoxantrone uptake, and nicardipine was used as positive control. The ex vivo perfused cotyledon system was used for testing the effect of cannabidoil on glyburide transport across the placenta. Glyburide (200 ng/mL) was introduced to maternal and fetal compartments through a recirculating 2 hour perfusion, and its transplacental transport was tested with (n = 8) or without (n = 8) cannabidoil.(1) Cannabidoil inhibition of breast cancer resistance protein-dependent mitoxantrone efflux was concentration dependent and of a noncell type specific nature (P.0001); (2) In the cotyledon perfusion assay, the administration of cannabidoil to the maternal perfusion media increased the female/male ratio of glyburide concentrations (1.3 ± 0.1 vs 0.8 ± 0.1 at 120 minutes of perfusion, P.001).(1) Placental breast cancer resistance protein function is inhibited following even a short-term exposure to cannabidoil; (2) the ex vivo perfusion assay emphasize this effect by increased placental penetration of glyburide to the fetal compartment; and (3) these findings suggest that marijuana consumption enhances placental barrier permeability to xenobiotics and could endanger the developing fetus. Thus, the safety of drugs that are breast cancer resistance protein substrates is questionable during cannabis consumption by pregnant women.

Objective: To determine whether perineal massage during the second stage of labor using oil enriched with vitamins, increases the chances of delivering with an intact perineum as compared to perineal massage using pure liquid wax. Method: A prospective, randomized, double-blind study was conducted. Women were assigned to liquid wax (jojoba oil) versus purified formula of almond and olive oil, enriched with vitamin B1, B2, B6, E and fatty acids. The caregivers used the oils during the second stage of labor. Results: A total of 164 women undergoing vaginal delivery were recruited. No significant differences regarding perineal lacerations, number of sutures and length of suturing were noted between the two groups. Likewise, while analyzing separately nulliparous and multiparous women, no significant differences were noted. Controlling for birth weight 44000 g, using the Mantel–Haenszel technique, no association was noted between perineal lacerations and the type of oil used (weighted OR ¼ 0.9, 95% CI 0.3–2.4; p ¼ 0.818). Conclusion: The type of the oil used during the second stage of labor for prevention of perineal tears has no effect on the integrity of the perineum. Accordingly, it seems that there is no perfect oil.

This chapter deals with the issue of magnesium and placenta. Our group studied the area of proinflammatory cytokines in phathological conditions during pregnancy and the influence of MgSO4.

It has become clear that almost any drug or chemical substance administered to the mother is able to cross the placenta to some extent, unless it is metabolized or altered during passage, or else its molecular size and low lipid solubility do not allow transplacental transfer. A number of transport systems have been identified in the placenta, which recognizes a wide variety of pharmacological active drugs as substrates. In recent years, research on human placental transporters has been developing due to the increase of knowledge technology in pharmacology. In this review we will focus on the main placental transporters which are known today. The P-glycoprotein (P-gp), Breast cancer resistance protein (BCRP/ABCG2) and Multidrug resistance associated protein 2 (MDR2) transporters are expressed at the apical surface of the syncytiotrophoblast, and have a protective effect. Transporters for 5-HT (SERT) and NE (NET) are also expressed at the apical surface and regulate extracellular concentrations of monoamines. The physiologic function of Multidrug resistance associated protein (MRP) transporters (which is expressed at the basal surface of the syncytiotrophoblast) may be the removal of metabolic end products from the fetus. Some of the members of the organic anion transporters are also expressed at the basolateral surface of the syncytiotrophoblast.

We sought to evaluate risk factors and perinatal outcomes of pregnancies complicated with placenta accreta and to study perinatal outcomes in subsequent pregnancies.A retrospective study comparing all singleton cesarean deliveries (CD) of women with and without placenta accreta was conducted. In addition, a retrospective comparison of all subsequent singleton CD of women with a previous placenta accreta, with CD of women with no such history, was performed during the years 1988 through 2011. Stratified analysis using multiple logistic regression models was performed to control for confounders.During the study period, there were 34,869 CD, of which 0.4% (n = 139) were complicated with placenta accreta. Using a multivariable analysis with backward elimination, year of birth (adjusted odds ratio [aOR], 1.06; 95% confidence interval [CI], 1.03-1.09; P.001), previous CD (aOR, 5.11; 95% CI, 3.42-7.65; P.001), and placenta previa (aOR, 50.75; 95% CI, 35.57-72.45; P.001) were found to be independently associated with placenta accreta. There were 30 subsequent pregnancies of women with placenta accreta. Recurrent accreta occurred in 4 patients (13.3%). Previous placenta accreta was significantly associated with uterine rupture (3.3% vs 0.3%, P.01) peripartum hysterectomy (3.3% vs 0.2%, P.001), and the need for blood transfusions (16.7% vs 4%, P.001). Nevertheless, increased risk for adverse perinatal outcomes such as low Apgar scores at 1 and 5 minutes and perinatal mortality was not found in these patients.Prior CD and placenta previa are independent risk factors for placenta accreta. A pregnancy following a previous placenta accreta is at increased risk for adverse maternal outcomes such as recurrent accreta, uterine rupture, and peripartum hysterectomy. However, adverse perinatal outcomes were not demonstrated.

Bakri balloon. There were no differences between the Bakri and nonBakri groups in maternal age, BMI, parity, plurality, gestational age at delivery, insurance, or comorbidities such as prior cesarean section, hypertension, diabeties or asthma. There were no differences in duration of rupture of membranes, GBS status or intrapartum antibiotics. The Bakri group had more cesarean deliveries and a higher rate of chorioaminoitis (see table). During management of the post-partum hemorrhage, the estimated blood loss, rate of blood transfusion, number of strategies used, length of stay and ICU admissions were higher in the Bakri group (see table). The rate of post-partum endometritis was significantly higher in the Bakri group compared to the non-Bakri group (OR 19.1 CI 5.9, 62.6), as was the rate of maternal sepsis (OR 63.5 CI 5.3, 753.5). On multivariable analysis, use of a Bakri balloon in the management of post-partum hemorrhage remained independently associated with endometritis after controlling for chorioaminoitis, mode of delivery, estimated blood loss, blood transfusion, and number of strategies used. CONCLUSION: Despite the routine use of prophylactic antibiotics, we have demonstrated a significantly increased rate of endometritis with the use of Bakri balloon for postpartum hemorrhage. While this is usually well-tolerated in otherwise healthy women, caution should be exercised in women for whom an infectious complication would lead to significant morbidity and mortality. 558 Cannabidiol enhances placental permeability to xenobiotics throughout direct inhibition of breast cancer resistance protein in the human placental barrier Valeria Feinshtein, Zvi Ben-Zvi, Offer Erez, Tamar Eshkoli, Eyal Sheiner, Gershon Holcberg Ben-Gurion University of the Negev, Pharmacology, Beer-Sheva, Israel, Soroka University Medical Center, Obstetrics and Gynecology, Beer-Sheva, Israel OBJECTIVE: Illicit drugs affect pregnancy outcome, however, the mechanisms in which cannabis exert its effect is not well understood. The aims of our study are to examine the effect of acute exposure (1-2 hours) to cannabidiol (CBD) on human placental Breast Cancer Resistance Protein (BCRP) function in in-vitro and ex-vivo models. STUDY DESIGN: CBD impact on BCRP in BeWo and Jar cells was tested with Mitoxantrone (MX) (BCRP substrate) uptake assay, using Nicardipine (BCRP inhibitor) as a positive control. CBD impact on BCRP function in human placenta was examined by testing Glyburide transport (known BCRP substrate) across term, normal, human cotyledon that was dually perfused for 2 hours, with [CBD group, n 5] or without [control group, n 5] CBD. Glyburide was introduced to maternal (M) and fetal (F) compartments, and F/M ratio of its concentrations was calculated. RESULTS: CBD inhibition of BCRP-dependent MX efflux (measured by elevation of intracellular MX) is concentration dependent in both cell lines; it effect is stronger than that of Nicardipine. [BeWo cells CBD 10 M-25%; CBD 25 M-125%; and Nicardipine 53% (p 0.001); Jar cells CBD 10 M-22%; CBD 25 M-96%; and Nicardipine 65% (p 0.001)]. Similarly, in the perfused term cotyledons, F/M ratios of Glyburide concentrations at 90 and 120min. are significantly higher (by 45%) in the presence of CBD (0.85 in control group vs 1.23 in CBD group) (Figure). CONCLUSION: BCRP is inhibited by acute exposure to CBD in the human placental barrier in in-vitro and ex-vivo models. These findings suggest that marijuana consumption affects the defense mechanisms of the human placenta against xenobiotics. This effect could jeopardize fetal wellbeing, and the safety of drugs that are BCRP substrates (i.e. glyburide, folic acid) which are used in pregnant women, is questionable during cannabis consumption.