National Perinatal Survey Research Articles

National survey to estimate seroprevalence for toxoplasmosis among pregnant women in France, 2021

Abstract Background Toxoplasmosis during pregnancy can result in congenital malformations and fetal death. In France, universal antenatal screening and monthly re-testing of seronegative pregnant women has been established since the 1970s. However, decreasing Toxoplasma gondii seroprevalence among pregnant women and lower incidence of congenital toxoplasmosis may challenge the cost-effectiveness of such programs. The aim of this study was to estimate the current seroprevalence among pregnant women participating in the 2021 national perinatal survey (ENP). Methods All adult women giving birth in France between 15-21 March 2021 were invited to participate in the ENP. Data collected included demographic information, nationality, socio-economic status, education level and Toxoplasma gondii serology. We classified a woman as seropositive if she had IgG antibodies prior to pregnancy or seroconverted during it. Univariable and multivariable regression analyses using Poisson model were conducted to estimate prevalence ratios (PRs) and identify significant factors associated with seropositivity. Results Among the 15,605 participating women, 0.22% seroconverted during pregnancy. The overall seroprevalence was 25.95%. Seropositivity was higher with increasing age (∼5% per 5 years), among residents of French overseas territories Guadeloupe/Saint Martin (PRs:1.07; 95%-CI: 1.03-1.10), La Réunion (PRs:1.10; 95%-CI: 1.08-1.13) and Mayotte (PRs:1.27; 95%-CI: 1.23-1.31), with lower education (PRs:1.22; 95%-CI: 1.04-1.42) and African nationality (PRs:1.11; 95%-CI: 1.02-1.20). Conclusions High seroprevalence for Toxoplasma gondii was found in older women, which may reflect their higher risk of past exposure. The observed geographical differences in seroprevalence may mirror dietary and environmental diversity. Declining seroprevalence among pregnant women in France can affect screening effectiveness and warrants a comprehensive review to determine appropriate future prevention strategies. Key messages • Older women and residents of French overseas territories show higher toxoplasmosis seroprevalence, possibly due to past exposure risks and diverse diets/environments. • Declining toxoplasmosis seroprevalence among pregnant women in France can affect screening effectiveness and warrants a comprehensive review to determine appropriate future prevention strategies.

Female genital mutilation/cutting in women delivering in France: An observational national study.

International migration from source countries has meant that clinicians in high income countries, that is, receiving countries, are increasingly caring for affected women affected by female genital mutilation/cutting (FGM/C). The aim of the present study was to assess the prevalence of FGM/C among women at childbirth, and its association with pregnancy outcomes. This was an observational study using data from a cross-sectional population-based study from the French National Perinatal Survey of 2021 (ENP) conducted in all maternity units in mainland France and including all women delivering a live birth during 1 week in March 2021 (N = 10 928). We estimated the FGM/C prevalence using (i) the diagnosed cases and (ii) the indirect prevalence estimated by UNICEF in each source country. We compared population characteristics and perinatal outcomes between women diagnosed with FGM/C and two groups: (i) women originating in source countries and diagnosed as without FGM/C and (ii) all women without diagnosis of FGM/C whatever the country of birth. Diagnosed prevalence of FGM/C was 95% (95% CI: 0.78-1.14] and the indirect computed estimation prevalence was estimated at 1.53% (95% CI: 1.31-1.77) in 113 and 183 women, respectively. Labor and delivery outcomes were globally similar in women with FGM/C and the other two groups. Only episiotomy was more frequently performed in women with FGM/C than in the other two groups. In receiving countries, obstetric outcomes of women with FGM/C can be similar to those of other women, which does not preclude need of further research and training to provide the most appropriate care, including enhanced attention to diagnosis.

Women’s country of birth and failure to catch up an overdue cervical cancer cytological screening participation during pregnancy in France, an observational study based on survey sources

BackgroundCervical cancer is the fourth most common cancer among women worldwide, both for incidence and mortality. Prevention relies on screening with a Pap test to detect precancerous lesions, which can then be treated. Access to this screening is currently both improvable and inequitable. Pregnancy may be an ideal moment for women to catch up on their overdue cervical cancer screening. In the general population, women's risk of not being screened is associated with their place of birth and other social factors; this may be true as well among pregnant women. Our objective was to study the association between women's place of birth and their failure to catch up with this screening during pregnancy.MethodsThe 2016 French National Perinatal Survey included 13,147 women who gave birth after 21 weeks of gestation. The association between their place of birth and failure to catch up on this screening (defined by the absence of a Pap test during pregnancy for women overdue for it) was adjusted for age, parity, education level, health insurance, and when they began prenatal care with logistic regression models.ResultsAmong the women for whom screening was then recommended, 49% were not up to date at the start of pregnancy, and of these, 53% were not caught up before delivery. After adjustment for other risk factors, maternal place of birth was not associated with a higher risk of failure to catch up with this screening during pregnancy. However, factors identified as associated with this risk included a low education level and late start of prenatal care.ConclusionAbout half of women overdue for cervical cancer screening did not catch up with it during their pregnancy. Professionals should pay special attention to women with lower education levels and late initiation of prenatal care, who constitute a group at high risk of not catching up on this screening during pregnancy.

The impact of the Baby-Friendly Hospital Initiative on breastfeeding rates at maternity units in France.

The Baby-Friendly Hospital Initiative (BFHI) is associated with improved breastfeeding outcomes in many high-income countries including the UK and the USA, but its effectiveness has never been evaluated in France. We investigated the impact of the BFHI on breastfeeding rates in French maternity units in 2010, 2016 and 2021 to assess if the BFHI aids to reduce inequalities in breastfeeding. We examined breastfeeding in maternity units (exclusive, mixed and any breastfeeding) in mothers of singleton full-term newborns using the 2010 (n = 13 075), 2016 (n = 10 919) and 2021 (n = 10 209) French National Perinatal Surveys. We used mixed-effect hierarchical multinomial regression models adjusting for neonatal, maternal, maternity unit and French administrative department characteristics, and tested certain interactions. The adjusted rate of exclusive breastfeeding was higher by +5.8 (3.4-8.1) points among mothers delivering in BFHI-accredited maternity units compared with those delivering in non-accredited units. When compared with average-weight newborns, this difference was sharper for infants with low birthweight: +14.9 (10.0-19.9) points when their birthweight was 2500 g. Mixed breastfeeding was lower by -1.7 points (-3.2-0) in BFHI-accredited hospitals, with no notable difference according to the neonatal or maternal characteristics. Mothers delivering in BFHI-accredited maternity units had higher exclusive breastfeeding rates and lower mixed breastfeeding rates than those delivering in non-accredited maternity units. The positive impact of the BFHI was stronger among low-birthweight neonates, who are less often breastfed, helping reduce the gap for this vulnerable group while favouring mothers with higher education levels.

Validity of a Delphi consensus definition of growth restriction in the newborn for identifying neonatal morbidity

BackgroundSmall-for-gestational age (SGA) is defined as a birthweight below a birthweight-percentile threshold, usually the 10th percentile, with the 3rd or 5th percentile used to identify severe SGA. SGA is used as a proxy for growth restriction in the newborn, but SGA newborns can be physiologically small and healthy. This definition also excludes growth restricted newborns who have weights above the 10th percentile. To address these limits, a Delphi study developed a new consensus definition of growth restriction in the newborn based on neonatal anthropometric and clinical parameters, but it has not been evaluated. ObjectivesTo assess the prevalence of growth restriction in the newborn according to the Delphi consensus definition and to investigate associated morbidity risks compared to definitions of SGA using birthweight-percentile thresholds. Study designData come from the 2016 and 2021 French National Perinatal Surveys which include all births ≥22 weeks and/or with birthweights ≥500 grams in all maternity units in France over a one-week period. Data are collected from medical records and interviews with mothers after the delivery. The study population included 23,897 liveborn singleton births. The Delphi consensus definition of growth restriction was birthweight <3rd percentile or at least 3 of the following criteria: birthweight, head circumference or length <10th percentile, antenatal diagnosis of growth restriction or maternal hypertension. A composite of neonatal morbidity at birth, defined as five-minute Apgar score <7, cord arterial pH <7.10, resuscitation and/or neonatal admission, was compared using the Delphi definition and usual birthweight-percentile thresholds for defining SGA using the following birthweight percentile groups: <3rd, 3rd-4th and 5th-9th percentiles. Relative risks were adjusted (aRR) for maternal characteristics (age, parity, body mass index, smoking, educational level, pre-existing hypertension and diabetes, and study year) and then for the consensus definition and birthweight percentile groups. Multiple imputation by chained equations was used to impute missing data. Analyses were carried out in the overall sample and among term and preterm newborns separately. Results4.9% (95% confidence intervals (CI): 4.6-5.2) of newborns were identified with growth restriction, of whom 29.7% experienced morbidity, yielding a aRR of 2.5 (95% CI: 2.2-2.7) compared to newborns without growth restriction. Compared to birthweight ≥10th percentile, morbidity risks were higher for low birthweight percentiles (<3rd aRR=3.3 (95%CI: 3.0-3.7), 3rd-4th RR=1.4 (95%CI:1.1-1.7), 5th-9th RR=1.4, (95%CI:1.2-1.6)). In adjusted models including the definition of growth restriction and birthweight percentile groups and excluding birthweights <3rd percentile, which are included in both definitions, morbidity risks remained higher for birthweights at the 3rd-4th percentile (aRR=1.4, 95% CI: 1.1-1.7) and 5th-9th percentile (aRR= 1.4, 95%CI: 1.2-1.6), but not for the Delphi definition of growth restriction (aRR= 0.9, 95%CI: 0.7-1.2). Similar patterns were found for term and preterm newborns. ConclusionThe Delphi consensus definition of growth restriction did not identify more newborns with morbidity than definitions of SGA based on birthweight percentiles. These findings illustrate the importance of evaluating the results of Delphi consensus studies before their adoption in clinical practice.

Prevalence of COVID-19 among pregnant women and its impact on childbirth in March 2021: Data from the French National Perinatal Survey

BackgroundSeveral series reported obstetric complications among pregnant women hospitalized for COVID. These data, because they focused on women with the most severe presentations or with specific immunosuppression, were likely to overestimate the risks associated with the infection at a global level. To date, population-based studies, most of which collected data from registers of women hospitalized during pregnancy for COVID-19, remain sparse. Neither the prevalence of COVID-19 in pregnant women nor the overall extent of obstetric complications worldwide, compared with uninfected pregnant women is clear. The impact of COVID-19 on perinatal care and obstetric management is thus difficult to evaluate. ObjectivesTo evaluate the prevalence and determinants of COVID-19 diagnosis during pregnancy and assess related obstetric practices and perinatal outcomes. Study designUsed data collected at childbirth in France from women included in the 2021 national perinatal survey, we compared women with and without a COVID-19 diagnosis (for sociodemographic characteristics) and then women with no COVID-19 diagnosis during pregnancy, women diagnosed more than 15 days preceding childbirth, and those diagnosed within those 15 days for outcomes. ResultsThe COVID-19 prevalence during pregnancy was 5.7 % (95 %CI 5.3–6.1) (678/11 930). The aOR for COVID-19 diagnosis associated with non-French nationality was 1.27 (95 %CI 1.03–1.58), with non-smoking 0.63 (95 %CI 0.55–0.81) and with multiparity 1.21 (95 %CI 1.02–1.45). Diagnosis occurred in the third trimester for 49 % —28.5 % in the 15 days before childbirth. Women with COVID-19 diagnosed during pregnancy had preterm births more often (9.6 %) than women without this diagnosis (6.9 %) (P = 0.007). Women with COVID-19 diagnosed within the 15 days preceding childbirth had more cesarean deliveries (28.3 %) than those diagnosed earlier (17.4 %) (P = 0.02). ConclusionsCOVID-19 diagnosis during pregnancy was associated with an increased risk of preterm birth. Obstetric outcomes were poorer in women with a COVID-19 diagnosis in the 15 days preceding childbirth.

Which fetal growth charts should be used in France? Position of the French College of Obstetricians and Gynecologists (CNGOF).

To assess which fetal growth charts best describe intrauterine growth in France defined as the ability to classify 10% of fetuses below the 10th percentile (small for gestational age [SGA]) and above the 90th percentile (large for gestational age [LGA]) in the second and third trimesters. We analyzed five studies on fetal ultrasound measurements using three French data sources. Two studies used second and third trimester ultrasound data from a nationwide birth cohort in 2011 (the ELFE study, N = 13 197 and N = 7747); one study used third trimester ultrasound data from on a nationwide cross-sectional study (the 2016 French National Perinatal Survey, N = 9940); and the last two studies were from the "Flash study" 2014 which prospectively collected ultrasound data from routine visits in the second and third trimesters (N = 4858 and N = 3522). For each study, we reported the percentage of measurements below the 10th percentile or above the 90th percentile, using French, Hadlock's, WHO and Intergrowth (IG) charts. WHO classified 4.7% and 16.3% of fetuses as having an estimated fetal weight (EFW) <10th and >90th percentiles in the second trimester compared to 3.3% and 34.7% with IG. The percentage of fetuses in the third trimester with an EFW <10th and >90th percentiles, ranged from 9.1% to 9.4% and from 8.0% to 11.1%, respectively, for WHO, and from 3.9% to 4.1% and from 17.3% to 21.6%, respectively, for IG. The WHO and IG charts for head circumference were very similar and performed well. Compared to the WHO charts, the French and Hadlock's charts deviated more frequently from the target percentiles values for EFW and biometric measures. It is recommended to use the WHO charts for the assessment of EFW and ultrasound biometric measurements in France (strong recommendation; low quality of evidence).

Preferences for labor and childbirth, expressed orally or as a written birth plan: Prevalence and determinants from a nationwide population-based study.

Shared decision-making is an important component of a patient-centered healthcare system. We assessed the prevalence of parturients with preferences for their labor and childbirth, expressed verbally in the birthing room or as a written birth plan, and studied maternal, obstetric, and organizational factors associated with their expression. Data came from the 2016 National Perinatal Survey, a cross-sectional nationwide population-based survey conducted in France. Preferences for labor and childbirth were studied in three categories: expressed verbally, in writing (birth plan), or unexpressed or nonexistent. Analyses used multinomial multilevel logistic regression. The analysis included 11,633 parturients: 3.7% had written a birth plan, 17.3% expressed their preferences verbally, and 79.0% either did not have or did not express any preferences. Compared with the latter group, written or verbal preferences were both significantly associated with prenatal care by independent midwives (respectively, adjusted odds ratio (aOR) 2.19; 95% confidence interval (CI), [1.59-3.03], and aOR 1.43; 95% CI [1.19-1.71]) and with attendance at childbirth education classes (respectively, aOR 4.99; 95% CI [3.49-7.15], and aOR 2.27; 95% CI [1.98-2.62]). As years in traditional schooling increased, so did its association with preferences. Conversely, parturients from African countries were significantly less likely than French mothers to express preferences. A written birth plan was also associated with characteristics of maternity unit organization. Only one in five parturients reported having expressed preferences for labor and childbirth to healthcare professionals in the birthing room. This expression of preferences was associated with maternal characteristics and the organization of care.

No Pain Management for Labor: Individual and Organizational Determinants: A Secondary Analysis of the 2016 French National Perinatal Survey

(Eur J Anaesthesiol. 2022;39:489–497) Pain management during labor and delivery is a fundamental right for patients in labor. Disparities in women’s access to analgesia in childbirth requires further research. Using national data, this study aims to determine the proportion of women who receive no labor pain management, and its individual and organizational factors.

Gestational weight gain adequacy and intrapartum oxytocin and cesarean section use: Observational population-based study in France.

Research on maternal prepregnancy weight suggests adiposity is associated with dysfunctional labor, but knowledge about how gestational weight gain (GWG) affects labor is sparse. Our objective was to evaluate associations between GWG adequacy and intrapartum obstetric interventions (oxytocin administration; cesarean section) necessitated by labor dysfunction. Using national, population-based French National Perinatal Survey 2016 data, we included term cephalic singleton pregnancies involving trial of labor (n=9724). For the intrapartum oxytocin administration analysis, we included only women with spontaneous labor (n=7352). GWG was calculated as the difference between end of pregnancy and prepregnancy weight (both self-reported) and categorized as insufficient, adequate (reference group), or excessive by prepregnancy body mass index (BMI; underweight <18.5, normal weight 18.5-24.9, overweight 25-29.9, obese ≥30 kg/m2 ) using the 2009 Institute of Medicine thresholds. Multilevel generalized estimating equation logistic regression models, unadjusted and adjusted for a priori confounders, evaluated intervention-GWG adequacy associations within BMI categories (under/normal weight combined), stratified by parity (primiparas; multiparas). GWG adequacy was associated with oxytocin use among under/normal weight women (primiparas: insufficient 57.3%, adequate 60.8%, excessive 65.0%, p=0.014; multiparas: insufficient 27.2%, adequate 29.1%, excessive 36.2%, p < 0.001) and overweight primiparas (insufficient 56.0%, adequate 58.7%, excessive 72.5%, p=0.002). In unadjusted and adjusted models, trends of increased odds of oxytocin administration among women with excessive GWG were found regardless of parity and prepregnancy BMI. Similarly, among under/normal weight women, GWG adequacy was associated with intrapartum cesarean section (primiparas: insufficient 10.7%, adequate 12.7%, excessive 15.3%, p=0.014; multiparas: insufficient 3.1%, adequate 3.5%, excessive 6.3%, p < 0.001) with increased cesarean section among multiparas with excessive GWG persisting in adjusted models (adjusted odds ratio 1.9, 95% confidence interval 1.3-2.7). However, intrapartum cesarean section was reduced among multiparas with overweight and obese prepregnancy BMI and excessive GWG. Excessive GWG was associated with intrapartum oxytocin administration, regardless of parity or prepregnancy BMI, and cesarean section among women with under/normal weight prepregnancy BMI, providing evidence for benefits of healthy GWG for normal labor progression. Additional research is needed to verify our findings and understand differences by BMI.

Results of the 2021 French National Perinatal Survey and trends in perinatal health in metropolitan France since 1995

To report results of the 2021 French National Perinatal Survey (ENP) in metropolitan France and assess trends in the main indicators of perinatal health, medical practices, and risk factors in France since 1995. All the samples included all women giving birth at a gestational age of at least 22 weeks of gestation and/or to an infant weighing at least 500 grams in all maternity units in metropolitan France during one week in 1995 (N=13048), 2003 (N=14324), 2010 (N=14546), 2016 (N=12553), and 2021 (N=12088). The data came from postpartum interviews of the women at the hospital and their medical records. Comparisons between surveys showed trends over time. Between 1995 and 2021, maternal characteristics changed. Maternal age and the frequency of women with obesity rose: in 2021, 24.6% of women were 35 years or older (21.1% in 2016, 19.2% in 2010, 15.9% in 2003 and 12.4% in 1995) and 14.4% were obese (11.8% in 2016, 9.9% in 2010 and 7.4% in 2003). Some antenatal prevention behaviors that improved in 2021 were not smoking during the third trimester, acid folic administration before pregnancy, and vaccination against influenza. The percentage of women with an early prenatal appointment ("4th month appointment"), implemented to facilitate screening of maternal vulnerability during pregnancy, has continued to rise. The percentage of women receiving prenatal care by midwives has risen markedly (39.0% in 2021 versus 11.7% in 2016). Serum screening for Down syndrome continues to increase (91.8% of women in 2021). The rate of induction of labor has risen significantly (20.2% in 1995 and 25.8% in 2021). The mode of delivery has not varied significantly since 2003; in 2021, the cesarean rate was 21.4% and the instrumental vaginal delivery rate 12.4%. Episiotomy was increasingly rare, among both primiparous and multiparous women (16.5% and 2.9% in 2021, respectively). The prevalence of coronavirus (SARS-CoV2) infection during pregnancy was 5.7%. Preterm live births increased regularly, slightly but significantly over the 1995-2016 period and then remained stable between 2016 and 2021 (7.0%). In 2021, 56.3% of women exclusively breastfed during their hospital stay, a modest increase in comparison with 2016 (54.6%). Routine national perinatal surveys highlight positive trends over time in some preventive practices, decreases in some medical interventions consistent with national guidelines, and the increasing role of midwives in prenatal care. Nonetheless, some indicators remain less than optimal and require more detailed analyses.

Trends and disparities in breastfeeding initiation in France between 2010 and 2016: Results from the French National Perinatal Surveys.

Breastfeeding (BF) initiation rates in French maternity units are among the lowest in Europe. After increasing for several years, they decreased between 2010 and 2016, although several maternal characteristics known to be positively associated with BF in France were more frequent. We aimed to (1) quantify adjusted trends in BF initiation rates between 2010 and 2016; (2) examine associations between BF initiation rates and newborn, maternal, maternity unit, and department‐level characteristics. Using data from the 2010 (n = 12,224) and 2016 (n = 11,089) French National Perinatal Surveys, we analysed BF initiation (exclusive, mixed, and any) through a succession of six mixed‐effect multinomial regression models, progressively adding adjustment covariates. Adjusted exclusive and any BF initiation rates decreased by 9.6 and 4.5 points, respectively, versus by 7.7 and 1.8 points, respectively, in the crude analysis. In both years, adjusted exclusive and any BF initiation rates were lowest in the following categories of mothers: low education level, single, high body mass index and multiple or premature births. Exclusive BF initiation decreased most in primiparous mothers, those with the lowest household income, mothers that had a vaginal delivery, women born in an African country and those who delivered in a maternity unit without Baby‐Friendly Hospital Initiative designation. The 2010–2016 decrease in BF initiation rates in France cannot be explained by changes in mothers' characteristics; quite the opposite, adjustment increased its magnitude. Additional efforts should be put in place to understand why this decrease is particularly sharp in some subgroups of mothers.

Exploring the socioeconomic disparities of maternal body mass index: a national study in France

BackgroundThe prevalence of overweight and obesity has increased in various countries. Normal weight before pregnancy is important to protect maternal and newborn health. This study aimed to describe the evolution of body mass index (BMI) before pregnancy in France and explore its association with two measures of socioeconomic status (SES), education and household income.MethodsData were from four national perinatal surveys in France in 1998, 2003, 2010 and 2016 to describe the time evolution of maternal BMI. We explored the links between BMI and women’s characteristics in the most recent period (2010–2016 surveys) since income information was not available before. Risk ratios (RRs) of underweight, overweight and obesity for each measure of SES were computed by using multivariable Poisson regression models.ResultsOverweight and obesity prevalence increased between 1998 and 2016, from 6% to 12% for obesity. Both were inversely associated with SES (higher prevalence among least educated and poorest women), with strong variations for each social indicator, even in multivariable analyses including both. Combining education and income revealed a wide gradient; RR for obesity was 6.01 (95% confidence interval 4.89–7.38) with low education and income <2000 euros/month vs. high education and income ≥4000 euros/month.ConclusionsPublic policies must implement programs to limit the increase in overweight and its unequal distribution in the population, alongside other policies to address the societal determinants of the obesogenic environment. Health professionals need to advise women to improve their eating and physical activity to limit weight gain from childhood to early adulthood.

No pain management for labour: individual and organisational determinants: A secondary analysis of the 2016 French National Perinatal Survey.

Disparities in access to pain management have been identified in several care settings, such as emergency departments and intensive care units, but with regard to labour analgesia, it remains poorly explored. To determine the proportion of women without pain management during labour and its individual and organisational determinants. Secondary analysis of a nationwide cross-sectional population-based study, the 2016 French National Perinatal Survey. All maternity units in France. Ten thousand and eleven women who attempted vaginal delivery with a labour duration at least 15 min. Absence of pain management, defined as absence of any pharmacological or nonpharmacological analgesic method during labour. Among the 10 011 women included, 542 (5.4%) had no labour pain management: 318 (3.7%) of the 8526 women who initially preferred to use neuraxial analgesia and 222 (15.8%) of the 1402 who did not. Using generalised estimating equations stratified according to the maternal antenatal preference for neuraxial analgesia, the common determinants of no labour pain management in both groups were no attendance at childbirth education classes and admission to a delivery unit during the night. Among women who initially preferred to use neuraxial analgesia, those who delivered in units with <1500 annual deliveries compared with units with 2000 to 3499 annual deliveries, were more likely to do without pain management [adjusted odds ratio (OR) = 1.96; 95% confidence interval (CI), 1.39 to 2.78]; among those who did not prefer to use it, women born abroad were more likely to do without labour pain management (adjusted OR = 1.64; 95% CI, 1.12 to 2.40). In France, 1 : 20 women had no labour pain management, and this proportion was three times higher among women who preferred not to use neuraxial analgesia. Enhancing maternal information on labour pain and its management, especially nonpharmacological methods, and rethinking care organisation, could improve access to analgesia of any kind.

Ability of municipality-level deprivation indices to capture social inequalities in perinatal health in France: A nationwide study using preterm birth and small for gestational age to illustrate their relevance

BackgroundEvidence-based policy-making to reduce perinatal health inequalities requires an accurate measure of social disparities. We aimed to evaluate the relevance of two municipality-level deprivation indices (DIs), the French-Deprivation-Index (FDep) and the French-European-Deprivation-Index (FEDI) in perinatal health through two key perinatal outcomes: preterm birth (PTB) and small-for-gestational-age (SGA).MethodsWe used two data sources: The French National Perinatal Surveys (NPS) and the French national health data system (SNDS). Using the former, we compared the gradients of the associations between individual socioeconomic characteristics (educational level and income) and “PTB and SGA” and associations between municipality-level DIs (Q1:least deprived; Q5:most deprived) and “PTB and SGA”. Using the SNDS, we then studied the association between each component of the two DIs (census data, 2015) and “PTB and SGA”. Adjusted odds ratios (aOR) were estimated using multilevel logistic regression with random intercept at the municipality level.ResultsIn the NPS (N = 26,238), PTB and SGA were associated with two individual socioeconomic characteristics: maternal educational level (≤ lower secondary school vs. ≥ Bachelor’s degree or equivalent, PTB: aOR = 1.43 [1.22–1.68], SGA: (1.31 [1.61–1.49]) and household income (< 1000 € vs. ≥ 3000 €, PTB: 1.55 [1.25–1.92], SGA: 1.69 [1.45–1.98]). For both FDep and FEDI, PTB and SGA were more frequent in deprived municipalities (Q5: 7.8% vs. Q1: 6.3% and 9.0% vs. 5.9% for PTB, respectively, and 12.0% vs. 10.3% and 11.9% vs. 10.2% for SGA, respectively). However, after adjustment, neither FDep nor FEDI showed a significant gradient with PTB or SGA. In the SNDS (N = 726,497), no FDep component, and only three FEDI components were significantly associated (specifically, the % of the population with ≤ lower secondary level of education with both outcomes (PTB: 1.5 [1.15–1.96]); SGA: 1.25 [1.03–1.51]), the % of overcrowded (i.e., > 1 person per room) houses (1.63 [1.15–2.32]) with PTB only, and unskilled farm workers with SGA only (1.52 [1.29–1.79]).ConclusionSome components of FDep and FEDI were less relevant than others for capturing ecological inequalities in PTB and SGA. Results varied for each DI and perinatal outcome studied. These findings highlight the importance of testing DI relevance prior to examining perinatal health inequalities, and suggest the need to develop DIs that are suitable for pregnant women.

Duration of second stage of labor and factors associated with prolonged second stage: A national population-based study in France

ObjectivesProlonged second stage of labor could be associated with an increase in maternal and neonatal morbidity. However, in France, no consensual definition of prolonged 2nd stage of labor exists and therefore factors associated with prolonged second stage have not yet been studied. From national population-based data, we aimed at defining the prolonged 2nd stage of labor in France and identifying its associated factors for women with epidural. Study designFrom the French national perinatal survey of 2016, we included all women who reached 2nd stage of labor and delivered at term of a singleton infant in cephalic presentation. We studied the distribution of the duration of the 2nd stage according to parity and defined prolonged 2nd stage as the 90th percentile. Among women with epidural, factors associated with a prolonged 2nd stage of labor were then explored by univariate and multilevel multivariable analysis, to take the cluster effect into account. The proportional change of variance was estimated for each multivariate model. ResultsAmong the 8154 women included, 3574 were nulliparous and 4580 multiparous. Prolonged second stage was defined as a duration of more than 89.6 min and 30.6 min for nulliparous and multiparous women without epidural; and respectively 185.7 min and 120.1 min for women with epidural analgesia. The factors associated with prolonged 2nd stage of labor were respectively for nulliparous and multiparous women, macrosomia (aOR 1.74 [1.03–2.94] and ORa 2.52 [1.69–3.76]), prenatal preparation classes (aOR 1.47 [1.04–2.08] and aOR 1.56 [1.21–2.01]), a prolonged 1st stage (aOR 1.47 [1.14–1.87] and aOR 1.52 [1.19–1.95]) and delivery in a public maternity unit (aOR 2.68 [1.50–4.78] and aOR 3.12 [1.88–5.17]). Women’s characteristics accounted for 3.4% of the variance and maternity organizational characteristics for 26.1%. ConclusionIn France, prolonged 2nd stage of labor can be defined as a 2nd stage exceeding 3 h in nulliparous and 2 h in multiparous women with epidural analgesia. The identification of its associated factors allows determining a target population of women at risk of prolonged 2nd stage and improve their 2nd stage’s management.

412 Preliminary efficacy and satisfaction study of a new single-use obstetrical vacuum: Icup2®

Objective: The 2016 National Perinatal Survey showed that 12.2% of women had an operative delivery in France. Vacuum delivery is the most frequent obstetrical instrument used in 49.8% of cases in our country. The 2006 initial concept of the Icup® vacuum was based on the development of a single-use device with a partially deformable cup to avoid any fetal scalp injury. However, owing to a significant rate of premature cup release, this first device required technical improvements which resulted in a new version: the Icup2® which obtained the CE label in February 2017.

Pregnancy planning and acceptance and maternal psychological distress during pregnancy: results from the National Perinatal Survey, France, 2016

BackgroundStudies report heightened risks of mental health problems among women who experience an unintended pregnancy, but few consider the complexity of pregnancy intentions. In this study, we evaluate how different dimensions of pregnancy intentions (pregnancy planning and pregnancy acceptance) relate to two maternal depressive symptoms and perceived psychological distress.MethodsThis study draws from a cross-sectional national survey conducted in all maternities in France over a one-week period in 2016. All mothers 18 years and older who had a live birth during the study period were invited to participate. After excluding women who underwent infertility treatment, our analytical sample included 10,339 women. We first described levels and correlates of pregnancy planning and acceptance, defined in four categories; planned/welcomed, unplanned/welcomed, planned/unwelcomed, unplanned/unwelcomed. We then assessed the bivariate and multivariate associations between pregnancy planning and acceptance and two outcomes: women’s self-perceived psychological health and the presence of two depressive symptoms during pregnancy. We used multivariate logistic regressions to evaluate these associations, after adjusting for socio-demographic and medical factors.ResultsAltogether 7.5 to 24.1% of mothers perceived their psychological health during pregnancy was poor, according to pregnancy planning and acceptance categories and 10.3 to 22.4% indicated feelings of sadness and loss of interest during pregnancy, according to pregnancy planning and acceptance categories. As compared to women with planned/welcomed pregnancies, the odds of perceived poor psychological health and depressive symptoms were 2.55 times (CI 2.20–2.95) and 1.75 times higher (CI 1.51–2.02), respectively, among unplanned/unwelcomed pregnancies and 2.02 (CI 1.61–2.53) and 2.07 (CI 1.7–2.5) higher, among planned/unwelcomed pregnancies. Among women with unplanned pregnancies, we also found higher odds of perceived poor psychological health among women whose pregnancy was unwelcomed while the odds of depressive symptoms were not different by pregnancy planning status among women with unwelcomed pregnancies.ConclusionsThese findings consolidate previous reports of the association between pregnancy intentions and maternal psychological distress, while further specifying the relationship, which mostly depends on the acceptance of pregnancy timing rather than on pregnancy planning. Identifying women with low pregnancy acceptance can potentially enhance current medical practice by improving early detection of maternal depression.

Testing the assumptions of customized intrauterine growth charts using national birth studies.

Customized intrauterine growth charts are widely used for growth monitoring and research. They are based on three assumptions: (1) estimated fetal weight (EFW) has a normal distribution with a constant coefficient of variation at all gestational ages; (2) Hadlock's growth curve accurately describes the relation between EFW and gestational ages; (3) associations between EFW and the fetal and maternal characteristics included in the customization model (fetal sex, pre-pregnancy weight, height, parity) are proportional throughout pregnancy. The aim of this study was to test whether these underlying assumptions are verified. Data came from (1) the French Longitudinal Study of Children (ELFE) cohort, which recruited births after 32weeks' gestation in 349 maternity hospitals in France in 2011, and (2) the National Perinatal Survey, which included births from all French maternity hospitals in 2016. The study population included, respectively, 6 920 and 8 969 singleton non-malformed term live births with data on customization characteristics and EFW. We computed the coefficient of variation by gestational age and then modeled the association of gestational age, maternal and fetal characteristics with EFW at the second and third trimester ultrasound and with birthweight using linear regression. To assess the proportionality of the impact of maternal and fetal characteristics, we computed the percent change in weight associated with these characteristics at these three time points. The coefficient of variation was close to 12% at each gestational age, but EFW was not normally distributed, leading to small but systematic underestimation of fetuses under the 10th percentile. Weights representing the 50th and 10th percentiles based on Hadlock's growth trajectory were lower than observed or predicted weights. Most characteristics more strongly impacted weight at birth than during pregnancy. In the French Longitudinal study of Children (ELFE) cohort, boys were 1.8% (95% confidence interval [CI] 1.3-2.4) heavier than girls in the third trimester, whereas this percentage was 4.6% (95% CI 4.0-5.2) at birth. In the National Perinatal Survey, these percentages were 2.3% (95% CI 1.8-2.8) and 4.3% (95% CI 3.8-4.8). These results from two independent sources revealed discrepancies between routine clinical EFW data used for growth monitoring and the customized growth model's assumptions.

Evidence for differential care in Down syndrome screening based on maternal origin: a population based survey in France

Abstract Background Previous studies showed disparities in prenatal screening for Down syndrome according to socio-economic status and maternal place of birth. Thus, it remains uncertain that those disparities are related to access difficulties or lack of information offered to women. Our objective was to assess the opportunity for informed choice regarding Down syndrome screening according to maternal place of birth. Methods Data were based on French national perinatal surveys of 2010 and 2016. These surveys include several questions relative to Down syndrome screening, such as measurement of nuchal translucency and realization of maternal serum screening. We considered that women had the opportunity for choice in case of realization or refusal of prenatal screening, or realization of amniocentesis or chorionic villous sampling. We considered that women had no opportunity for choice in case of ignorance of the realization of the tests, or if the screening has not been performed because not proposed, late prenatal follow-up, or another reason or unknown reason. We used multinomial logistic regression models to assess the association between the use of the tests and women country of birth. Results The proportion of women undergoing measurement of nuchal translucency or maternal serum screening was higher in women born in France than women born in another country. After adjustment on the year of the survey, maternal age, parity, education level and type of maternity, and after exclusion of women without adequate prenatal follow-up, the opportunity for making an informed choice for Down syndrome screening was higher for women born in France than women born in another European country (ORa 2.36; 95%CI,1.8-3.0), in Maghreb (ORa 4.01; 95%CI,3.4-4.8) or in another African country (ORa 3.52(2.8-4.3). Conclusions Disparities in the use of Down syndrome screening according to women place of birth are almost partly related to differences in the opportunity of an informed choice.