Comment déterminer la date de début de grossesse ?

Salomon, L. J.

doi:10.1016/j.jgyn.2011.09.016

Cited by 29 publications

(9 citation statements)

References 85 publications

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“…We also used GA at the ultrasounds and at birth in weeks and days. Second and third trimester ultrasounds are recommended in France for all pregnant women at 20–25 and 30–35 weeks' gestation, respectively, 30 and it is also recommended that GA be calculated using crown–rump length measured before 14 weeks' gestation 31 …”

Section: Methodsmentioning

confidence: 99%

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

Hocquette

Monier

Blondel

et al. 2022

Acta Obstet Gynecol Scand

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Introduction 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. Material and methods Data came from (1) the French Longitudinal Study of Children (ELFE) cohort, which recruited births after 32 weeks' 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. Results 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). Conclusions These results from two independent sources revealed discrepancies between routine clinical EFW data used for growth monitoring and the customized growth model’s assumptions.

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Section: Methodsmentioning

confidence: 99%

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

Hocquette

Monier

Blondel

et al. 2022

Acta Obstet Gynecol Scand

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“…Inclusion criteria were women > 18 years, carrying a low‐risk singleton pregnancy without congenital malformations from 20 to 25 weeks of gestation, with an uncomplicated pregnancy. Pregnancy dating was based on crown‐rump length measurement in the first trimester, as recommended by the French College of Obstetrics and Gynecology . Each included woman had a routine second‐trimester scan according to 2016 French national guidelines from the National Conference on Obstetric and Fetal Ultrasound ( Conférence Nationale d'Echographie Obstétricale et Fœtale )…”

Section: Methodsmentioning

confidence: 99%

A score‐based method for quality control of fetal hard palate assessment during routine second‐trimester ultrasound examination

Fuchs

Burlat

Grosjean

et al. 2018

Acta Obstet Gynecol Scand

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“…Each pregnant woman contributed to the study with a single ultrasound scan and was prospectively and consecutively included over time. Pregnancy dating was based on the crown-rump length measurement in the first trimester, as recommended by the French College of Obstetrics and Gynecology (CNGOF) 18 , 19 .…”

Section: Methodsmentioning

confidence: 99%

Association between amniotic fluid evaluation and fetal biometry: a prospective French “Flash” study

Fuchs

Aouinti

Souaied

et al. 2018

Sci Rep

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We aimed to study the association between three different methods of assessing the amount of amniotic fluid (subjective method (SM), deepest vertical pocket (DVP) and amniotic fluid index (AFI)) and estimated fetal weight (EFW) (in percentile or Z-score) after adjustment on maternal-fetal parameters. We performed a nationwide cross-sectional study through the French network of obstetric sonographers using the “flash” study method and including low-risk singleton pregnancies from 18–40 weeks. Crude and adjusted odds ratio were computed after stratification upon 2nd and 3rd trimester of pregnancy. 1667 ultrasound scans performed by 65 operators were included. Only Z-score of EFW was significantly associated with SM in both trimesters. For DVP and AFI, Z-score of EFW and male fetal gender was significantly associated with them in 2nd trimester. In the 3rd trimester, both Z-score of EFW and large (LGA) or small for gestational age (SGA) fetus were significantly associated with AFI. and DVP. Overweight woman and class I obesity women were also significantly associated with DVP modification. In conclusion, all three methods of amniotic fluid evaluation are significantly associated to estimated fetal weight. DVP and AFI appeared equivalent except that maternal-fetal factors seemed to have a higher impact in DVP than AFI.

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Comment déterminer la date de début de grossesse ?

Cited by 29 publications

References 85 publications

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

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

A score‐based method for quality control of fetal hard palate assessment during routine second‐trimester ultrasound examination

Association between amniotic fluid evaluation and fetal biometry: a prospective French “Flash” study

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