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To describe the growth dynamics of fetuses with initial fetal growth restriction (FGR) later outgrowing the 10th centile for estimated fetal weight with respect to perinatal outcomes and maternal factors.A multicenter prospective study recruited 1116 patients for ultrasound surveillance between 2010 and 2012. All pregnancies were growth-restricted singleton gestations between 24 + 0 and 36 + 0 weeks. Biometry and Doppler analysis were carried out, and delivery and adverse perinatal outcomes were recorded.A total of 193 (17%) fetuses outgrew their diagnosis of initial FGR (surpassed the 10th centile) on their last sonogram before delivery. These fetuses were termed "growers," to compare with the true FGR group. The mothers of "growers" were less likely to be smokers (14% vs 25%, P = 0.0001) or affected by hypertensive pregnancy complications (5.2% vs 15%, P = 0.001). Of the growers, 49 (25%) had an abnormal umbilical artery Doppler; however, in most cases (33/49, 67%), this was a single episode of raised umbilical artery pulsatility index, which subsequently normalized.There were dynamic growth changes in FGR fetuses, with 17% outgrowing their original diagnosis. Positive growth spurts more commonly occurred in healthy mothers. Once a fetus had outgrown the 10th centile, antenatal surveillance could be decreased.

Background Maternal obesity and depression are common and both have been associated with adverse pregnancy outcomes. Aims The aim of this observational study was to examine the relationship between maternal body mass index (BMI) category and self-reported depression at the first antenatal visit. Methods Women who delivered a baby weighing ≥ 500 g over nine years 2009–2017 were included. Self-reported sociodemographic and clinical details were computerised at the first antenatal visit by a trained midwife, and maternal BMI was calculated after standardised measurement of weight and height. Results Of 73,266 women, 12,304 (16.7%) had obesity, 1.6% (n = 1126) reported current depression and 7.5% (n = 3277) multiparas reported a history of postnatal depression. The prevalence of self-reported maternal depression was higher in women who had obesity, > 35 years old, were socially disadvantaged, smokers, had an unplanned pregnancy and used illicit drugs. After adjustment for confounding variables, obesity was associated with an increased odds ratio (aOR) for current depression in both nulliparas (aOR 1.7, 95% CI 1.3–2.3, p 0.001) and multiparas (aOR 1.8, 95% CI 1.5–2.1, p 0.001) and postnatal depression in multiparas (aOR 1.4, 95% CI 1.3–1.5, p 0.001). The prevalence of current depression was higher in women with moderate/severe obesity than in women with mild obesity (both p 0.001). Conclusions We found that self-reported maternal depression in early pregnancy was independently associated with obesity. The prevalence of depression increased with the severity of obesity. Our findings highlight the need for implementation of strategies and provision of services for the prevention and treatment of both obesity and depression.

peer-reviewed The full text of this article will not be available in ULIR until the embargo expires on the 08/01/2022 Objective To evaluate the correlation between Umbilical Artery (UA) Doppler and its feasibility across categories of maternal BMI in the presence of foetal growth restriction (FGR). Methods 1074 Singleton pregnancies with suspected FGR on ultrasound examination between 24+0 and 36+0 weeks' gestation were reviewed. Evaluation of the UA Doppler was performed at 1‐2 weekly intervals. Abnormal UA Doppler findings and delivery outcomes were compared between the different maternal BMI categories. Results Increased UA pulsatility index (PI > 95th centile) was reported in 81% of obese category 2 patients (BMI

Maternal obesity is an emerging challenge in contemporary obstetrics. To date there has been no study analysing the relationship between specific maternal body composition measurements and foetal soft-tissue measurements. The aim of this study was to determine whether measurement of maternal body composition at booking predicts foetal soft-tissue trajectories in the third trimester. We analysed the relationship between foetal thigh in the third trimester and both maternal BMI and body composition using the Tanita digital scales in the first trimester. Foetal subcutaneous thigh tissue measurements were obtained at intervals of 28, 32 and 36 weeks of gestation. A total of 160 women were identified. There was a direct correlation between MTST at 36 weeks and BMI (p = .002). There was a positive correlation between MTST at 36 weeks and leg fat mass (p = .13) and leg fat free mass (p = .013). There was a positive correlation between arm fat free mass and MTST at 36 weeks. We showed there is an association between maternal fat distribution and foetal subcutaneous thigh tissue measurements. MTST may be more useful in determining if a child is at risk of macrosomia. Impact statement Previous studies have suggested that maternal obesity programmes intrauterine foetal adiposity and growth. The aim of this study was to examine the relationship in a high-risk obstetric population between measurements of maternal body composition in early pregnancy and the assessment of foetal adiposity in the third trimester using serial ultrasound measurements of mid-thigh soft-tissue thickness. BMI is only a surrogate measurement of fat and does not measure fat distribution. Our study shows the distribution of both maternal fat and fat-free mass in early pregnancy may be positively associated with foetal soft-tissue measurements in the third trimester. Maternal arthropometric measurements other than BMI may help predict babies at risk of macrosomia and neonatal adiposity.

Maternal-fetal attachment (MFA) psychologically is well described. Suboptimal attachment may have negative consequences particularly if it is associated with unhealthy maternal behaviour that may potentially increase the risk of adverse pregnancy outcomes. The perception of stress or anxiety is also associated with potential adverse outcomes including preterm birth.This cross-sectional study examined MFA and perceived stress at the time of the first ultrasound examination in early pregnancy.Convenience sampling was used to recruit women after they presented to the Ultrasound Department for a routine dating ultrasound at their first antenatal visit. Informed consent was obtained and clinical and sociodemographic details were recorded. Women were invited to complete validated Cranley MFA and Perceived Stress Scale (PSS) questionnaires.Of the 90 women recruited, 80 completed the questionnaires successfully. No association was found between the MFA score and maternal age, parity, education, marital status, previous pregnancy loss or smoking behaviour. An unplanned pregnancy was associated with a lower mean MFA score (p0.01) and a higher mean PSS score (p0.005). These relationships persisted in a multiple regression analysis controlling for maternal age and parity.In early pregnancy, an unplanned pregnancy is associated with a lower MFA and higher PSS score. Additional research is required to assess if this persists as pregnancy advances.Maternal-Fetal Attachment (MFA), Maternal-Fetal Attachment Scale (MFAS), Perceived stress scale (PSS), Maternal Antenatal Attachment Scale (MAAS), Standard Deviation (SD), Central Statistics Office (CSO), Body Mass Index (BMI), Relative Risk (RR).

The early detection of foetal growth restriction and macrosomia is an important goal of modern obstetric care. Aberrant foetal growth is an important cause of perinatal morbidity and mortality. Current modalities for detecting the abnormal foetal growth are often inadequate. Pulse wave analysis using applanation tonometry is a simple and non-invasive test that provides information about the cardiovascular system. Arterial elasticity has previously been implicated in the pathophysiology of pre-eclampsia and cardiovascular disease. Our study examined the relationship between maternal arterial elasticity and birthweight by using pulse wave analysis. We discovered that increased large artery elasticity predicted a larger baby at birth. Large artery elasticity therefore has the potential to act as a useful screening tool which may help in the prediction of women who are at risk of aberrant foetal growth.

Neural tube defects (NTDs) carry a heavy burden for affected individuals and their family. Physical and neurological outcome measures may help in counselling couples. The aim of this audit was to review all cases of NTDs seen at a tertiary referral foetal medicine unit. Cases were identified from obstetric, neonatal and neurosurgical records. Thirty-six cases of NTDs were identified. Of the 36, 25% (n = 9, one trisomy 18) opted for termination of pregnancy abroad. Of the remaining 27, 19% (n = 5) died in the antepartum period. 81% (n = 22) were liveborn with four neonatal deaths (one trisomy 18). Of 15 cases, 14 had neurosurgical repair within a median time of 3 days and 9 of these also had a ventriculoperitoneal shunt inserted. Antenatal ultrasound accurately diagnosed lesion level in the majority of cases. The survival rate for babies diagnosed with non-lethal neural tubes defects is high when multidisciplinary care is initiated early.

Purpose Maternal obesity represents a challenge in the sonographic (US) assessment of fetal weight, and is a recognized risk factor for adverse pregnancy outcome. The objective of this secondary analysis of data from the Prospective Observational Trial to Optimize Pediatric Health in fetal growth restriction (FGR) Study (PORTO) was to describe the effect of maternal obesity on the accuracy of US in determining the estimated fetal weight (EFW) and the perinatal outcome of pregnancies affected by FGR. Methods Between 2010 and 2012, 1,116 women with nonanomalous singleton pregnancies with an EFW in less than the tenth centile were recruited for the PORTO study. Maternal body mass index (BMI) was divided into five subcategories: normal (BMI 40). The accuracy of the EFW was determined in women who delivered within 2 weeks of their last US scan. Perinatal outcomes were analyzed by BMI subcategory. Results Of the 1,074 patients with complete records, 691 (64%) were of normal weight, 258 (24%) were overweight, 93 (9%) were in obese class 1, 32 (3%) were in obese class 2, and none were in obese class 3. Overall, the EFW determined prior to delivery was within 6% of the actual birth weight in all BMI subcategories. Overweight and obese women delivered more commonly by cesarean section and at earlier gestational ages than did women with a normal BMI (p = 0.0008), resulting in lower birth weights (p = 0.0031) and significantly increased composite perinatal morbidity (p

ObjectivesTo examine associations between maternal pregnancy-specific stress and umbilical (UA PI) and middle cerebral artery pulsatility indices (MCA PI), cerebroplacental ratio, absent end diastolic flow (AEDF), birthweight, prematurity, neonatal intensive care unit admission and adverse obstetric outcomes in women with small for gestational age pregnancies. It was hypothesised that maternal pregnancy-specific stress would be associated with fetoplacental haemodynamics and neonatal outcomes. DesignThis is a secondary analysis of data collected for a large-scale prospective observational study. SettingThis study was conducted in the seven major obstetric hospitals in Ireland and Northern Ireland. ParticipantsParticipants included 331 women who participated in the Prospective Observational Trial to Optimise Paediatric Health in Intrauterine Growth Restriction. Women with singleton pregnancies between 24 and 36 weeks gestation, estimated fetal weight Primary and secondary outcome measuresSerial Doppler ultrasound examinations of the umbilical and middle cerebral arteries between 20 and 42 weeks gestation, Pregnancy Distress Questionnaire (PDQ) scores between 23 and 40 weeks gestation and neonatal outcomes. ResultsConcerns about physical symptoms and body image at 35–40 weeks were associated with lower odds of abnormal UAPI (OR 0.826, 95% CI 0.696 to 0.979, p=0.028). PDQ score (OR 1.073, 95% CI 1.012 to 1.137, p=0.017), concerns about birth and the baby (OR 1.143, 95% CI 1.037 to 1.260, p=0.007) and concerns about physical symptoms and body image (OR 1.283, 95% CI 1.070 to 1.538, p=0.007) at 29–34 weeks were associated with higher odds of abnormal MCA PI. Concerns about birth and the baby at 29–34 weeks (OR 1.202, 95% CI 1.018 to 1.421, p=0.030) were associated with higher odds of AEDF. Concerns about physical symptoms and body image at 35–40 weeks were associated with decreased odds of neonatal intensive care unit admission (OR 0.635, 95% CI 0.435 to 0.927, p=0.019). ConclusionsThese findings suggest that fetoplacental haemodynamics may be a mechanistic link between maternal prenatal stress and fetal and neonatal well-being, but additional research is required.

Objective The purpose of this study was to examine the relationship between prenatal measures of subcutaneous tissue as surrogate markers of fetal nutritional status and correlate them with neonatal total body composition. Methods This prospective longitudinal study of 62 singleton pregnancies obtained serial biometry and subcutaneous tissue measurements at 28, 33 and 38 weeks gestation. These measurements were then correlated with neonatal body composition, which was analysed using the PEAPOD™ Infant Body Composition System (Cosmed USA, Concord, CA, USA). Results At 38 weeks gestation, fetal abdominal subcutaneous tissue (FAST) in millimetres was significantly associated with infant fat mass at delivery (+64 g per mm of FAST, p

Objective To evaluate opinions among Irish obstetricians and obstetric trainees regarding the optimal definition, assessment and management of pregnancies affected by intrauterine growth restriction (IUGR). Study design An anonymous, structured, web-based survey that comprised 14 questions was sent to 200 obstetricians and obstetric trainees in Ireland. Results Of the 113 participants (57% response rate), the majority (50%) were consultants, with over 10 years' clinical experience (46%), who worked in large maternity units (58%) with neonatal units providing care for preterm IUGR fetuses (94%). Eighty-three clinicians (74%) agreed that an estimated fetal weight (EFW) below the 10th centile constitutes small-for-gestational age (SGA). The majority ( n =93; 82%) would deliver the SGA fetus between 37 +0 and 39 +6 weeks gestation. In total, the survey yielded 30 different IUGR definitions; the top three definitions were (i) an EFW below the 5th centile ( n =18; 16%), (ii) an EFW below the 10th centile with oligohydramnios and abnormal umbilical artery (UA) Doppler ( n =16; 14%), and (iii) an EFW below the 10th centile ( n =12; 11%). In the evaluation of the preterm IUGR fetus with abnormal UA Doppler, the assessment of amniotic fluid volume, middle cerebral artery, ductus venosus, cardiotocograph (CTG) and biophysical profiling was performed in 74%, 60%, 60%, 54% and 52% respectively. The majority of clinicians applied three or more assessment modalities and 60% referred to a maternal-fetal medicine (MFM) subspecialist. Interestingly, even among MFM subspecialists there was no common consistent management approach. Most doctors (81%) would deliver the IUGR fetus for CTG abnormalities but MFM subspecialists more commonly deliver on the basis of absent end-diastolic flow in the UA alone (37% vs. 10%; p =0.006). Two-thirds of doctors ( n =74) would implement customised growth charts if they became available for their population and over 80% thought that a national guideline on IUGR would be beneficial. Conclusion The results of this survey confirm the inconsistencies surrounding the clinical management of IUGR pregnancies and highlight the need for standardisation of terminology and antenatal surveillance, implementation of fetal weight customisation and national guidance for Ireland.

Prediction of hypertensive disease in pregnancy re- mains challenging. Risk factor based screening util- izing history, physical characteristics, uterine artery Doppler and serum markers have been used with va- rying success. As hypertension in pregnancy appears to be associated with changes in the maternal vascu- lature, we have investigated the utility of maternal ar- terial elasticity measurement, prior to 20 weeks gesta- tion, in the prediction of hypertensive disease in preg- nancy. A HDI/Pulsewave CR2000 Research Cardio- vascular Profiling System was used to obtain radial artery pulse pressure waveforms from 623 Caucasian women at the time of their first antenatal visit. Out- come data were available in 610 cases and these com- prised the study group. The results showed that wo- men who subsequently developed gestational hypertension (n = 20) had higher baseline systolic, diastolic and pulse pressure values (though within the normal range) but similar arterial elasticity to those patients who did not develop hypertension. Women who later developed pre-eclampsia (n = 23) had, in addition, re- duced large artery elasticity and increased systemic vascular resistance compared with women who did not develop hypertension. The measurement of mater- nal radial artery elasticity in early pregnancy may pro- vide an additional refinement in screening for hyperten- sive disease, particularly pre-eclampsia, in pregnancy.

Introduction: The objective of this investigation was to study fetal thigh volume throughout gestation and explore its correlation with birth weight and neonatal body composition. This novel technique may improve birth weight prediction and lead to improved detection rates for fetal growth restriction. Materials and Methods: Fractional thigh volume (TVol) using 3D ultrasound, fetal biometry and soft tissue thickness were studied longitudinally in 42 mother-infant pairs. The percentages of neonatal body fat, fat mass and fat-free mass were determined using air displacement plethysmography. Correlation and linear regression analyses were performed. Results: Linear regression analysis showed an association between TVol and birth weight. TVol at 33 weeks was also associated with neonatal fat-free mass. There was no correlation between TVol and neonatal fat mass. Abdominal circumference, estimated fetal weight (EFW) and EFW centile showed consistent correlations with birth weight. Thigh volume demonstrated an additional independent contribution to birth weight prediction when added to the EFW centile from the 38-week scan (p = 0.03). Conclusion: Fractional TVol performed at 33 weeks gestation is correlated with birth weight and neonatal lean body mass. This screening test may highlight those at risk of fetal growth restriction or macrosomia.

Background: The Prenatal Distress Questionnaire (PDQ) is a short measure designed to assess specific worries and concerns related to pregnancy. The aim of this study was to confirm the factor structure of the PDQ in a group of pregnant women with a small for gestational age infant (< 10th centile). Methods: The first PDQ assessment for each of 337 pregnant women participating in the Prospective Observational Trial to Optimise paediatric health (PORTO) study was analysed. All women enrolled in the study were identified as having a small for gestational age foetus (< 10th centile), thus representing an 'elevated risk' group. Data were analysed using confirmatory factor analysis (CFA). Three models of the PDQ were evaluated and compared in the current study: a theoretical uni-dimensional measurement model, a bi-dimensional model, and a three-factor model solution. Results: The three-factor model offered the best fit to the data while maintaining sound theoretical grounds(χ2 (51df) = 128.52; CFI = 0.97; TLI = 0.96; RMSEA = 0.07). Factor 1 contained items reflecting concerns about birth and the baby, factor 2 concerns about physical symptoms and body image and factor 3 concerns about emotions and relationships. Conclusions: CFA confirmed that the three-factor model provided the best fit, with the items in each factor reflecting the findings of an earlier exploratory data analysis. © 2013 Society for Reproductive and Infant Psychology.

To examine the validity of a growth trajectory method to discriminate between pathologically and constitutionally undergrown fetuses using repeated measures of estimated fetal weight.In a prospective, observational, multicenter study in Ireland, 1,116 women with a growth-restricted fetus diagnosed participated with the objective of evaluating ultrasound findings as predictors of pediatric morbidity and mortality. Fetal growth trajectories were based on estimated fetal weight.Between 22 weeks of gestation and term, two fetal growth trajectories were identified: normal (96.7%) and pathologic (3.3%). Compared with the normal trajectory, the pathologic trajectory was associated with an increased risk for preeclampsia (odds ratio [OR] 8.1, 95% confidence interval [CI] 2.6-23.4), increased umbilical artery resistance at 30 weeks of gestation (OR 12.6, 95% CI 4.6-34.1) or 34 weeks of gestation (OR 28.0, 95% CI 8.9-87.7), reduced middle cerebral artery resistance at 30 weeks of gestation (OR 0.33, 95% CI 0.12-0.96) or 34 weeks of gestation (OR 0.14, 95% CI 0.03-0.74), lower gestational age at delivery (mean 32.02 weeks of gestation compared with 38.02 weeks of gestation; P.001), and higher perinatal complications (OR 21.5, 95% CI 10.5-44.2). In addition, 89.2% of newborns with pathologic fetal growth were admitted to neonatal intensive care units compared with 25.9% of those with normal growth.Fetal growth trajectory analysis reliably differentiated fetuses with a pathologic growth pattern among a group of women with growth-restricted fetuses. With further development, this approach could provide clarity to how we define, identify, and ultimately manage pathologic fetal growth.II.

This study examined variations in caesarean section (CS) rates associated with a woman's birthplace and differences in maternal adiposity. Women were enrolled in the 1st trimester. Maternal adiposity was assessed by body mass index (BMI) and bioelectrical impedance analysis (BIA). Irish women were compared with women born in the 14 countries who joined the European Union (EU) before 2004 (EU 14), and with those born in 12 countries who joined following enlargement (EU 12). Of the 2,811 women enrolled, 2,235 women were born in Ireland, 100 in EU 14 countries and 476 in EU 12 countries. Based on a BMI29.9 kg/m(2), maternal obesity was higher in Irish (19.8%; n = 443) and EU 14 women (19.0%; n = 19) compared with EU 12 women (9.5%; n = 45), p0.001. BIA of maternal body composition confirmed increased adiposity in both the Irish and EU 14 women. Variations in emergency CS rates in primigravidas based on the woman's birthplace were associated with maternal adiposity and induction of labour, both modifiable risk factors for CS. We recommend, therefore, that induction of labour in obese primigravidas should be undertaken only in carefully considered clinical circumstances. Our findings also suggest economic development in Europe may drive an increase in the CS rates mediated through increased levels of maternal obesity and, therefore, public health interventions should focus on optimising a woman's prepregnancy weight.

Objective The aim of this study was to profile longitudinal changes in thigh muscle and fat with gestation and to determine whether thigh measurements can improve the prediction of birth weight (BW). Methods A prospective longitudinal study of subcutaneous soft tissue measurements was conducted in 328 singleton fetuses at 28 and 37 weeks gestation. Estimated fetal weight (EFW) was calculated using abdominal circumference, femur length, biparietal diameter, and head circumference. Results The fetal abdominal subcutaneous tissue (FAST) and thigh muscle and fat show an increase with gestation. At 28 weeks gestation, the abdominal circumference, thigh fat, FAST, and EFW percentile were found to be significant predictors of BW. A combination of EFW percentile and thigh fat were found to be the optimal multivariate model at 28 weeks for predicting BW. At 37 weeks, BW prediction using EFW percentile, FAST, and thigh fat was the most accurate. The results revealed acceptable reproducibility for fetal thigh muscle and fat. Conclusion This study provides reference ranges for thigh fat and muscle at 28 and 37 weeks gestation. The inclusion of fetal thigh fat in the algorithm improves the predictive power for birth weight. This information is important to explore the role of fetal thigh in the detection of aberrant growth. © 2013 John Wiley & Sons, Ltd.

Detecting aberrant fetal growth has long been an important goal of modern obstetrics. Failure to diagnose abnormal fetal growth results in perinatal morbidity or mortality. However, the erroneous diagnosis of abnormal growth may lead to increased maternal anxiety and unnecessary obstetric interventions. We review the aetiology of deviant fetal growth and its implications both for the neonatal period and later in adult life. We examine maternal factors that may influence fetal growth such as obesity, glycaemic control and body composition. We discuss novel ways to improve our detection of abnormal fetal growth with a view to optimising antenatal care and clinical outcomes. These include using customised centiles or individualised growth assessment methods to improve accuracy. The role of fetal subcutaneous measurements as a surrogate marker of the nutritional status of the baby is also discussed. Finally, we investigate the role of Doppler measurements in identifying growth-restricted babies.

Objective: The purpose of this nested cohort study was to compare the rate of pre-pregnancy supplementation in obese women with that of women with a normal BMI. Methods: Pregnant women were enrolled at their convenience in a large university hospital. Weight and height were measured in the first trimester and BMI categorised. Results: Of the 288 women, 35.1% were in the normal, 29.5% in the overweight and 35.4% in the obese BMI categories. Only 45.1% (n = 46) of the obese women took pre-pregnancy folic acid compared with 60.4% (n = 61) of women with a normal BMI (p < 0.03). The lower incidence of folic acid supplementation in obese women was associated with an unplanned pregnancy in 36.3% of women compared with 22.8% in the normal BMI category (p < 0.04). Conclusions: Obese women should take folate supplements whether they are planning to conceive or not.

Objectives To compare the diagnosis of the foetal head position in the second stage of labour by ultrasound scan performed by a novice sonographer and by clinical assessment, to that of an expert sonographer (gold standard); and to evaluate the acceptability of ultrasound in the second stage of labour to women and clinicians. Study design This is a case series. We recruited sixty women delivering in a university hospital in Dublin, Ireland. An abdominal scan was performed by a novice and an expert ultrasonographer and a clinical assessment was performed by an obstetrician or midwife. Each assessor was blinded to the findings of the others. The main outcome measures were errors in the diagnosis of the foetal head position and acceptability of abdominal ultrasound in the second stage of labour. Results The ultrasound findings of the novice and expert ultrasonographers were consistent in 52 (87%) cases for the foetal head position; 80% accuracy for the first ten scans performed by the novice (median time 150 s) and 90% for the last ten scans (median time 10 s). The novice made no occipito-anterior/occipito-posterior (OA/OP) errors. The clinical diagnosis of the foetal head position was incorrect in 25 (42%) cases; 8 (13%) OA/OP errors. Women and clinicians did not consider the ultrasound assessment to be intrusive. Conclusion An abdominal scan by a novice ultrasonographer is an accurate and acceptable method of diagnosing the foetal head position in the second stage of labour and may have a role to play in assessment prior to instrumental delivery.

Objective The aims of the study were to establish reference ranges for placental length and thickness in a low-risk obstetric population and to assess the likelihood of a small for gestational age (SGA) neonate on the basis of placental length at 18–24 weeks' gestation. Methods Placental length and thickness were measured by two sonographers in 520 singleton pregnancies. Uterine artery Doppler studies and a placental morphological assessment were also performed. Placental size was correlated with the birthweight centiles at delivery. Results A placental length

Objective To establish reference ranges using longitudinal data for aortic isthmus (AoI) Doppler indices in appropriate-for-gestational-age (AGA) fetuses and to document the longitudinal trends in a cohort of small-for-gestational-age (SGA) fetuses with normal umbilical artery Doppler and in fetuses with intrauterine growth restriction (IUGR) and abnormal umbilical artery Doppler. Methods AoI Doppler reference ranges were established from longitudinal data on 72 AGA singleton fetuses. Reliability of AoI Doppler flow measurements at two different sites and reproducibility between two operators was reviewed. A prospective longitudinal study of AoI Doppler indices in 48 SGA fetuses with normal umbilical artery Doppler and 10 IUGR fetuses was performed. Results The AoI pulsatility index (PI) and peak systolic velocity (PSV) in AGA fetuses showed a significant increase with gestational age. Analysis of intra- and interoperator variability revealed no significant mean difference in measurements of AoI-PI or AoI-PSV. Observations of AoI-PI and AoI-PSV from SGA fetuses did not differ significantly from those of AGA or IUGR fetuses. Retrograde flow in the AoI did not predate changes in the ductus venosus in IUGR fetuses. Conclusions Reference ranges for fetal AoI Doppler parameters in AGA fetuses constructed using longitudinal data are consistent with those obtained from cross-sectional data. The AoI Doppler parameters in SGA fetuses did not differ from those in AGA fetuses. Preterm IUGR fetuses did not manifest alterations in AoI-PI or AoI-PSV prior to changes in biophysical profile or ductus venosus Doppler. Further large-scale prospective studies are needed to determine whether AoI Doppler parameters are of any value in timing delivery or reducing adverse neurodevelopmental outcome. Copyright © 2012 ISUOG. Published by John Wiley & Sons, Ltd.

What is already known about this subject • Maternal obesity is associated with an increased use of healthcare resources including medication costs in an outpatient setting. What this study adds • This study shows an increase in inpatient medication usage associated with maternal obesity. This is the case in the antenatal period but not in the peripartum period. Summary Maternal obesity is associated with increased medical and obstetric complications. We compared the inpatient antenatal and peripartum medication usage in obese women to that in women in the normal body mass index (BMI) category. White European women with a singleton pregnancy were enrolled after a glucose tolerance test excluded diabetes mellitus at 28 weeks gestation. Weight and height were measured in the first trimester and BMI calculated. Records of medications administered were collated from patient drug charts. Of the 284 women studied, there were 97, 85 and 102 women in the normal, overweight and obese categories, respectively. Delivery details across the weight categories did not vary significantly and Caesarean section rates were 22.7, 22.4 and 26.5%, respectively. The length of hospital stay postpartum for each category was similar. The administration of antenatal medication showed a trend towards increasing usage with increasing BMI category with increases in analgesic and antibiotic use. There was no difference in peripartum medication usage. The study showed that maternal obesity was associated with an increased inpatient usage of medication in the antenatal period. This has implications for healthcare costs particularly if the prevalence of maternal obesity continues to increase.

Aim: To determine the body mass index (BMI) and the body composition of fathers-to-be and to compare the findings with those of mothers-to-be during early pregnancy. Methods: This was a descriptive and comparative study based at a large university teaching hospital. We enrolled men whose partner booked for antenatal care in the first trimester of pregnancy during July 2009. The height and weight of both parents-to-be were measured digitally, and BMI was calculated. The body compositions of the couple were analysed using bioelectrical impedance. Results: Of 167 fathers-to-be, 14% were obese (BMI > 29.9 kg/m2) compared with 16% of mothers-to-be (NS). However, 50% were overweight (BMI 25.0–29.9 kg/m2) compared with 26% of mothers-to-be (P

Objective. To examine the relationship between maternal glucose levels and intrauterine fetal adiposity distribution in women with a normal oral glucose tolerance test (OGTT) at 28 weeks gestation.Study Design. We recruited 231 women with a singleton pregnancy. At 28 and 37 weeks gestation, sonographic measurements of fetal body composition were performed. Multiple regression analysis was used to study the influence of different maternal variables on fetal adiposity distribution.Results. Maternal glucose levels correlated with the fetal abdominal subcutaneous tissue measurements (; ) and with birth weight (; ). Maternal glucose levels did not correlate with the fetal mid-thigh muscle thickness and mid-thigh subcutaneous tissue measurements.Conclusion. We found that in nondiabetic women maternal glucose levels not only influence fetal adiposity and birth weight, but also influence the distribution of fetal adiposity. This supports previous evidence that maternal glycemia is a key determinant of intrauterine fetal programming.

A 32-year-old primigravida presented to the Maternal Assessment Unit in spontaneous labour contracting regularly with a 36 h history of prolonged rupture of membranes. The patient had a 7 year medical history of Stress Induced Anaphylaxis (SIA). This was triggered by particular foods followed by exercise. The patient had been taking regular antihistamines prior to pregnancy and carries an epi-pen. Unfortunately the patient presented to the Maternal Assessment Unit in established labour in the early hours of the morning. The patient had no anaphylactic symptoms on presentation. 150 mg IV hydrocortisone and IV antihistamine were given prophylactically. A decision was made to proceed to caesarean section. We collectively felt that a spinal anaesthetic was the most effective way of blunting any evolving stress response to labour. An uncomplicated caesarean section was performed under spinal anaesthetic and the patient was discharged home well on Day 3 postoperatively. Stress or Exercise Induced Anaphylaxis was first described in 1980 by Sheffer and Austen1. To date there are only five cases of SIA in pregnancy in the literature2–6. Given the fact that this patient presented in labour and was at higher risk of potentially developing stress induced anaphylaxis we felt that a spinal anaesthetic would be the most efficient and safest method of blunting the stress response and thus preventing anaphylaxis. Although it is reported that morphine and other histamine releasing drugs should be avoided in this patient cohort[f], it is important to note the our patient received intra-thecal morphine prior to caesarean section without complication. This case also highlights the importance of thorough multidisciplinary antenatal care in order to plan for such complex patients should they present out of hours in labour. From the evidence to date, if these women do proceed to labour IV hydrocortisone, IV antihistamine and early epidural is recommended.

Intrauterine fetal growth restriction (IUGR) is an important pregnancy complication associated with significant adverse clinical outcome, stillbirth, perinatal morbidity and cerebral palsy. To date, no uniformly accepted management protocol of Doppler surveillance that reduces mortality and cognitive morbidity has emerged. Aortic isthmus (AoI) evaluation has been proposed as a potential monitoring tool for IUGR fetuses. In this review, the current knowledge of the relationship between AoI Doppler velocimetry and preterm fetal growth restriction is reviewed. Relevant technical aspects and reproducibility data are reviewed as we discuss AoI Doppler and its place within the existing repertoire of Doppler assessments in placental insufficiency. The AoI is a link between the right and left ventricles which perfuse the lower and upper body, respectively. The clinical use of AoI waveforms for monitoring fetal deterioration in IUGR has been limited, but preliminary work suggests that abnormal AoI impedance indices are an intermediate step between placental insufficiency-hypoxemia and cardiac decompensation. Further prospective studies correlating AoI indices with arterial and venous Doppler indices and perinatal outcome are required before encorporating this index into clinical practice.

Objective To review the prenatal diagnosis of apparently isolated severe ventriculomegaly (SVM) in a tertiary referral fetal medicine unit and report on perinatal and neurodevelopmental outcomes. Methods All cases of isolated SVM referred to Fetal Medicine at the NMH between 2000 and 2008 were identified. Outcome information was obtained from detailed telephone interviews with parents and paediatric records and histopathology in cases of stillborn fetuses. Results Thirty-six cases of SVM were referred, out of which 19 were diagnosed with ‘apparently’ isolated SVM. Macrocrania was present in 88% at 36 weeks (mean HC 439 mm). Cephalocentesis was performed in six cases with poor prognosis. All resulted in perinatal loss. The neurodevelopmental outcome of survivors with isolated SVM (ten live-born survivors) showed major neurological morbidity in 50% (5/10) of the cases, mild morbidity in 40% (4/10) and a normal outcome in only one case. Conclusion Isolated SVM had a very poor perinatal outcome with neurological and physical disability in the overwhelming majority. Only one case of the 17 (6%) diagnosed initially with ‘apparently’ isolated SVM was born alive without handicap. Information from our series may aid couples in decision making about pregnancy interruption and the difficult decision of prenatal or intrapartum cephalocentesis. Copyright © 2009 John Wiley & Sons, Ltd.

Increases in clinical complications associated with maternal obesity have generated interest in increasing physical activity (PA) and exercise levels as an intervention to improve pregnancy outcomes. The objective of this study was to examine the relationship between BMI categorisation and PA and exercise levels as pregnancy advances. This was an observational study in a large university maternity hospital. Women were recruited at their convenience before they left hospital after delivering a baby weighing 500 g or more. They completed a detailed customised physical activity and exercise questionnaire. BMI categorisation was based on the measurement of weight and height in early pregnancy. Of the 155 women recruited, 42.5 % (n = 66) were primigravidas and 10.3 % (n = 16) were smokers. Mean Body Mass Index (BMI) was 24.6 kg/m2 and 14.2 % (n = 22) were obese, based on a BMI >29.9 kg/m2. Overall, women decreased their exercise from an average 194 min (range 0–650 min) per week pre-pregnancy to 98 min antenatally (range 0–420 min) (p

Intrauterine growth restriction accounts for a significant proportion of perinatal morbidity and mortality currently encountered in obstetric practice. The primary goal of antenatal care is the early recognition of such conditions to allow treatment and optimization of both maternal and fetal outcomes. Management of pregnancies complicated by intrauterine growth restriction remains one of the greatest challenges in obstetrics. Frequently, however, clinical evidence of underlying uteroplacental dysfunction may only emerge at a late stage in the disease process. With advanced disease the only therapeutic intervention is delivery of the fetus and placenta. The cerebroplacental ratio is gaining much interest as a useful tool in differentiating the at-risk fetus in both intrauterine growth restriction and the appropriate-for-gestational-age setting. The cerebroplacental ratio quantifies the redistribution of the cardiac output resulting in a brain-sparing effect. The Prospective Observational Trial to Optimize Pediatric Health in Intrauterine Growth Restriction group previously demonstrated that the presence of a brain-sparing effect is significantly associated with an adverse perinatal outcome in the intrauterine growth restriction cohort.The aim of the Prospective Observational Trial to Optimize Pediatric Health in Intrauterine Growth Restriction study was to evaluate the optimal management of fetuses with an estimated fetal weight10th centile. The objective of this secondary analysis was to evaluate if normalizing cerebroplacental ratio predicts adverse perinatal outcome.In all, 1116 consecutive singleton pregnancies with intrauterine growth restriction completed the study protocol over 2 years at 7 centers, undergoing serial sonographic evaluation and multivessel Doppler measurement. Cerebroplacental ratio was calculated using the pulsatility and resistance indices of the middle cerebral and umbilical artery. Abnormal cerebroplacental ratio was defined as1.0. Adverse perinatal outcome was defined as a composite of intraventricular hemorrhage, periventricular leukomalacia, hypoxic ischemic encephalopathy, necrotizing enterocolitis, bronchopulmonary dysplasia, sepsis, and death.Data for cerebroplacental ratio calculation were available in 881 cases, with a mean gestational age of 33 (interquartile range, 28.7-35.9) weeks. Of the 87 cases of abnormal serial cerebroplacental ratio with an initial value1.0, 52% (n = 45) of cases remained abnormal and 22% of these (n = 10) had an adverse perinatal outcome. The remaining 48% (n = 42) demonstrated normalizing cerebroplacental ratio on serial sonography, and 5% of these (n = 2) had an adverse perinatal outcome. Mean gestation at delivery was 33.4 weeks (n = 45) in the continuing abnormal cerebroplacental ratio group and 36.5 weeks (n = 42) in the normalizing cerebroplacental ratio group (P value.001).The Prospective Observational Trial to Optimize Pediatric Health in Intrauterine Growth Restriction group previously demonstrated that the presence of a brain-sparing effect was significantly associated with an adverse perinatal outcome in our intrauterine growth restriction cohort. It was hypothesized that a normalizing cerebroplacental ratio would be a further predictor of an adverse outcome due to the loss of this compensatory mechanism. However, in this subanalysis we did not demonstrate an additional poor prognostic effect when the cerebroplacental ratio value returned to a value1.0. Overall, this secondary analysis demonstrated the importance of a serial abnormal cerebroplacental ratio value of1 within the34 weeks' gestation population. Contrary to our proposed hypothesis, we recognize that reversion of an abnormal cerebroplacental ratio to a normal ratio is not associated with a heightened degree of adverse perinatal outcome.

The use of body mass index (BMI) for the diagnosis of obesity has limitations, especially when comparing ethnic groups with different body proportions. The aim of this prospective study was to compare maternal body composition in early pregnancy between Caucasian Irish and Indian women. A total of 81 Indian women and 81 Irish Caucasian women were matched for age, parity and BMI. Maternal weight and height were measured, and body composition analysed using bioelectrical impedance. The Irish women were taller and weighed more than the Indian women (p

The purpose of this study was to profile sleep patterns during pregnancy according to body mass index (BMI) and to correlate labour outcomes with both BMI and hours sleep. Data were collected from 200 postpartum women detailing sleep characteristics before and during pregnancy. A validated sleep questionnaire was employed, which comprised of questions about sleep apnoea, snoring, subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleeping medication and daytime dysfunction. Descriptive analyses were used. With advancing gestation, the mean (SD) number of hours sleep per night declined: pre-pregnancy 8.1 (SD 1.4); 1st trimester 8.3 (SD 1.8); 2nd trimester 7.7 (SD 1.7) and 3rd trimester 6.7 (SD 2.2). In the 18.5-24.9 BMI group, there was a marked difference in hours sleep per night from pre-pregnancy to 1st (8.6 h, p = 0.007), 2nd (7.9 h, p = 0.023) and 3rd (6.4 h, p = 0.000) trimesters in primiparous women. In the 25-29.9 BMI group, there was a difference from pre-pregnancy to 3rd trimester (p = 0.000). These changes were not reflected in a clinically significant difference in birth weight or mode of delivery.

This study sought to determine whether ultrasound assessment of fetal head circumference (FHC) at the onset of labor can predict the likelihood of operative delivery.We performed a prospective cohort study of 200 nulliparous women with singleton, cephalic, term pregnancies in an Irish Maternity Hospital. Transabdominal ultrasound assessment of FHC was performed when spontaneous labor was diagnosed or immediately prior to induction. Odds ratios for operative delivery (instrumental delivery or cesarean section) and maternal and neonatal morbidity were calculated using logistic regression with FHC categorized at a ≥350-mm cut-off (90th percentile).Ultrasound assessment of FHC at the onset of labor was highly correlated with post-delivery neonatal head circumference (NHC) (Pearson's correlation coefficient 0.74), suggesting that it can be measured reliably. FHC ≥350 mm was associated with more than twice the risk of any operative delivery (OR 2.5, 95% CI 1.0-6.2) and a two-fold increased risk of cesarean section for dystocia (OR 2.0, 95% CI 1.0-4.3). Differences in maternal and neonatal morbidity were not statistically significant.These preliminary data suggest that ultrasound assessment of FHC at the onset of labor may be useful in identifying women at greater risk of intrapartum intervention and warrant further research.

Objective To determine whether the use of ultrasound can reduce the incidence of incorrect diagnosis of the fetal head position at instrumental delivery and subsequent morbidity. Design Two-arm, parallel, randomised trial, conducted from June 2011 to December 2012. Setting Two maternity hospitals in the Republic of Ireland. Sample A cohort of 514 nulliparous women at term (≥37 weeks of gestation) with singleton cephalic pregnancies, aiming to deliver vaginally, were recruited prior to an induction of labour or in early labour. Methods If instrumental delivery was required, women who had provided written consent were randomised to receive clinical assessment (standard care) or ultrasound scan and clinical assessment (ultrasound). [Correction added on 17 April 2014, after first online publication: Sentence was amended.] Main outcome measure Incorrect diagnosis of the fetal head position. Results The incidence of incorrect diagnosis was significantly lower in the ultrasound group than the standard care group (4/257, 1.6%, versus 52/257, 20.2%; odds ratio 0.06; 95% confidence interval 0.02–0.19; P

Objectives To identify risk factors and morbidity associated with suboptimal instrument placement at instrumental delivery. Design Observational study, nested within a randomised controlled trial. Setting Two university-affiliated maternity hospitals. Sample A cohort of 478 nulliparous women at term (≥37 weeks of gestation) undergoing instrumental delivery. Methods Univariable and multivariable logistic regression analyses were performed. Main outcome measures Risk factors for suboptimal application of vacuum or forceps, maternal and neonatal morbidity, and the sequential use of instruments, second operator, and caesarean section following failed instrumental delivery. Results Instrument placement was suboptimal in 138 of 478 (28.8%) deliveries. Factors associated with suboptimal instrument placement included fetal malposition (OR 2.44, 95% CI 1.62–3.66), mid-cavity station (OR 1.68, 95% CI 1.02–2.78), and forceps as the primary instrument (OR 2.01, 95% CI 1.33–3.04). Compared with optimal instrument placement, suboptimal placement was associated with prolonged hospital stay (adjusted OR 2.28, 95% CI 1.30–4.02) and neonatal trauma (adjusted OR 4.25, 95% CI 1.85–9.72). Suboptimal placement was associated with a greater use of sequential instruments (adjusted OR 3.99, 95% CI 1.94–8.23) and caesarean section for failed instrumental delivery (adjusted OR 3.81, 95% CI 1.10–13.16). The mean decision to delivery interval (DDI) was 4 minutes longer in the suboptimal group (95% CI 2.1–5.9 minutes). Conclusions Suboptimal instrument placement is associated with increased maternal and neonatal morbidity and procedural complications. Greater attention should be focused on instrument placement when training obstetricians for instrumental delivery.

We sought to determine the cause of adverse perinatal outcome in fetal growth restriction (FGR) where umbilical artery (UA) Doppler was normal, as identified from the Prospective Observational Trial to Optimize Pediatric Health (PORTO). We compared cases of adverse outcome where UA Doppler was normal and abnormal.The PORTO study was a national multicenter study of1100 ultrasound-dated singleton pregnancies with an estimated fetal weight10th centile. Each pregnancy underwent intensive ultrasound, including multivessel Doppler. UA Doppler was considered abnormal when the pulsatility index was95th centile or end-diastolic flow was absent/reversed. Adverse perinatal outcome was defined as a composite of intraventricular hemorrhage, periventricular leukomalacia, hypoxic ischemic encephalopathy, necrotizing enterocolitis, bronchopulmonary dysplasia, sepsis, or death.In all, 57 (5.0%) of the 1116 fetuses had an adverse perinatal outcome. Nine (1.3%) of 698 fetuses with normal UA Doppler had an adverse outcome, compared with 48 (11.5%) of 418 with abnormal UA Doppler (P.0001). There were 2 perinatal deaths in the normal group and 6 in the abnormal group (P = .01). The perinatal deaths in the normal group were 1 case of pulmonary hypoplasia after prolonged preterm rupture of the membranes from 12 weeks' gestation and a case of placental abruption. Gestation at delivery was 33 ± 3 vs 31 ± 4 weeks (P = .05) and mean birthweight was 1830 ± 737 vs 1146 ± 508 g (P = .001) in the respective groups. Neonatal sepsis was the commonest adverse outcome in both groups: 0.1% and 0.4%, respectively (P = .01).Adverse perinatal outcome is uncommon in FGR with normal UA Doppler. The cases we identified were associated with heterogenous pathologies. FGR with normal UA blood flow is a largely benign condition.

Background: Intrauterine growth restriction (IUGR) is the single largest contributing factor to perinatal mortality in non-anomalous fetuses. Advances in antenatal and neonatal critical care have resulted in a reduction in neonatal deaths over the past decades, while stillbirth rates have remained unchanged. Antenatal detection rates of fetal growth failure are low, and these pregnancies carry a high risk of perinatal death. Methods: The Prospective Observational Trial to Optimize Paediatric Health in IUGR (PORTO) Study recruited 1,200 ultrasound-dated singleton IUGR pregnancies, defined as EFW

Objective We compared the incidence of spontaneous miscarriage in women categorised as obese, based on a Body Mass Index (BMI) >29.9 kg/m2, with women in other BMI categories. Study design In a prospective observational study conducted in a university teaching hospital, women were enrolled at their convenience in the first trimester after a sonogram confirmed an ongoing singleton pregnancy with fetal heart activity present. Maternal height and weight were measured digitally and BMI calculated. Maternal body composition was measured by advanced bioelectrical impedance analysis. Results In 1200 women, the overall miscarriage rate was 2.8% (n = 33). The mean gestational age at enrolment was 9.9 weeks. In the obese category (n = 217), the miscarriage rate was 2.3% compared with 3.3% in the overweight category (n = 329), and 2.3% in the normal BMI group (n = 621). There was no difference in the mean body composition parameters, particularly fat mass parameters, between those women who miscarried and those who did not. Conclusions In women with sonographic evidence of fetal heart activity in the first trimester, the rate of spontaneous miscarriage is low and is not increased in women with BMI > 29.9 kg/m2 compared to women in the normal BMI category.

Objective To determine if Fetal Abdominal Subcutaneous Tissue (FAST) measurements using antenatal ultrasound differ between male and female fetuses. Study design Women who had an ultrasound examination for fetal growth between 20 and 40 weeks gestation were studied. Women with diabetes mellitus were excluded. The fetal anterior abdominal subcutaneous tissue was measured on the anterior abdominal wall in millimetres anterior to the margins of the ribs, using magnification at the level of the abdominal circumference. The fetal sex was recorded after delivery. Results A total of 557 fetuses were measured, 290 male and 267 female. The FAST measurements increased with gestational age. The FAST increased at the same rate for both male and female fetuses and at any given week there was no sex difference. Conclusions The increased fat composition in females reported after birth was not found in abdominal wall subcutaneous fat measurements using ultrasound during pregnancy. Antenatal centile charts for FAST do not need to be based on sex.

OBJECTIVE: The purpose of this retrospective cohort study was to review pregnancy outcomes in morbidly obese women who delivered a baby weighing 500 g or more in a large tertiary referral university hospital in Europe. METHODS: Morbid obesity was defined as a BMI ≥40.0 kg/m(2) (WHO). Only women whose BMI was calculated at their first antenatal visit were included. The obstetric out-comes were obtained from the hospital's computerised database. RESULTS: The incidence of morbid obesity was 0.6% in 5,824 women. Morbidly obese women were older and were more likely to be multigravidas than women with a normal BMI. The pregnancy was compli-cated by hypertension in 35.8% and diabetes mellitus in 20.0% of women. Obstetric interventions were high, with an induction rate of 42.1% and a caesarean section rate of 45.3%. CONCLUSIONS: Our findings show that maternal morbid obesity is associated with an alarmingly high incidence of medical complications and an increased level of obstetric interventions. Consideration should be given to developing specialised antenatal services for morbidly obese women. The results also highlight the need to evaluate the effectiveness of prepregnancy interventions in morbidly obese women.

Objective An objective of the Prospective Observational Trial to Optimize Pediatric Health in IUGR (PORTO) study was to evaluate multivessel Doppler changes in a large cohort of intrauterine growth restriction (IUGR) fetuses to establish whether a predictable progressive sequence of Doppler deterioration exists and to correlate these Doppler findings with respective perinatal outcomes. Study Design More than 1100 unselected consecutive ultrasound-dated singleton pregnancies with estimated fetal weight (EFW) less than the 10th centile were recruited between January 2010 and June 2012. Eligible pregnancies were assessed by serial Doppler interrogation of umbilical (UA) and middle cerebral (MCA) arteries, ductus venosus (DV), aortic isthmus, and myocardial performance index (MPI). Intervals between Doppler changes and patterns of deterioration were recorded and correlated with respective perinatal outcomes. Results Our study of 1116 nonanomalous fetuses comprised 7769 individual Doppler data points. Five hundred eleven patients (46%) had an abnormal UA, 300 (27%) had an abnormal MCA, and 129 (11%) had an abnormal DV Doppler. The classic pattern from abnormal UA to MCA to DV existed but no more frequently than any of the other potential pattern. Doppler interrogation of the UA and MCA remains the most useful and practical tool in identifying fetuses at risk of adverse perinatal outcome, capturing 88% of all adverse outcomes. Conclusion In contrast to previous reports, we have demonstrated multiple potential patterns of Doppler deterioration in this large prospective cohort of IUGR pregnancies, which calls into question the usefulness of multivessel Doppler assessment to inform frequency of surveillance and timing of delivery of IUGR fetuses. These data will be critically important for planning any future intervention trials.

Objective To identify maternal and pregnancy-related physiological and pathological variables associated with fetal growth and birthweight in Ireland and to develop customized birthweight centile charts for the Irish population that will aid in appropriate identification and selection of growth-restricted fetuses requiring increased antenatal surveillance. Study design Prospectively collected outcome data of 11,973 consecutive ultrasound-dated singleton pregnancies between 2008 and 2009 from six maternity units in Ireland (Dublin, Galway, Limerick and Belfast) were included for analysis. Maternal weight and height at booking, parity and ethnicity were recorded and combined with birthweight, fetal gender and pregnancy outcomes. Coefficients were derived by backward multiple regression using a stepwise backward elimination approach. Results A total of 11,973 ultrasound-dated singleton pregnancies were included in the analysis. Over 90% of women ( n = 10,850) were of Irish or European descent, 3.4% ( n = 407) were African or African Caribbean, 1.7% ( n = 208) were Indian; 42.2% ( n = 5057) were nulliparous, 32.8% ( n = 3923) had one previous delivery after 24 weeks’ gestation, 15.6% ( n = 1872) had two previous deliveries and 9.4% ( n = 1121) had three or more previous deliveries. Mean term birthweight for a standard Irish mother was 3491grams. Babies of all other ethnic origins were smaller than their Irish counterparts. African Caribbean, Bangladeshi, Indian and Pakistani babies were on average 237 g, 196 g, 181 g and 181 g lighter, respectively, when compared to the average Irish offspring. Pathological factors significantly affecting term birthweight were pre-gestational diabetes (+137 g; p p p = 0.009) and maternal obesity (−41.6 g; p = 0.012). Conclusion Birthweight in this Irish maternity population is subject to similar influences to those observed in studies from the UK, Sweden, USA and Australasia. The derived coefficients can be used for customized assessment of fetal growth potential in Ireland. The implementation of these customized centile charts and their free online availability will aid clinicians in Ireland in the interpretation of fetal weight estimation.