J Créquat1, M Duyme, G Brodaty. 1. Département d'échographie, CHU Bichat-Claude-Bernard, Paris, France.
Abstract
OBJECTIVE: The aim of Biometry 2000 was to establish reliable sonographic fetal auxology reference charts for biparietal diameter, head circumference, abdominal diameter, abdominal circumference and femur length. DESIGN: A prospective multicentric longitudinal and transversal study was carried out. SUBJECTS: The data of this study were obtained from 35,456 scans recorded in 10,043 women for a period of one year. METHODS: Sonographic measurements were performed using a single method for each parameter. Twins and unknown gestational ages were not included. No exclusions were made for small-for-age, congenital malformations or any event during pregnancy. Assuming measurements have a normal distribution, centiles were calculated after polynomial regression models from mean and standard deviation according to gestational age in exact weeks from last menstrual period. RESULTS: A total of 32,584 fetal biparietal diameters, 20,400 direct cephalic circumferences, 31,790 transverse abdominal diameters, 21,562 direct abdominal circumferences and 30,960 femur lengths were obtained. Fetal growth charts with means, standard deviations and centiles are presented. CONCLUSION: The multicentric study, Biometry 2000, has established sonographic fetal charts derived from a large sample of scans and unselected pregnant women assuming a normal distribution.
OBJECTIVE: The aim of Biometry 2000 was to establish reliable sonographic fetal auxology reference charts for biparietal diameter, head circumference, abdominal diameter, abdominal circumference and femur length. DESIGN: A prospective multicentric longitudinal and transversal study was carried out. SUBJECTS: The data of this study were obtained from 35,456 scans recorded in 10,043 women for a period of one year. METHODS: Sonographic measurements were performed using a single method for each parameter. Twins and unknown gestational ages were not included. No exclusions were made for small-for-age, congenital malformations or any event during pregnancy. Assuming measurements have a normal distribution, centiles were calculated after polynomial regression models from mean and standard deviation according to gestational age in exact weeks from last menstrual period. RESULTS: A total of 32,584 fetal biparietal diameters, 20,400 direct cephalic circumferences, 31,790 transverse abdominal diameters, 21,562 direct abdominal circumferences and 30,960 femur lengths were obtained. Fetal growth charts with means, standard deviations and centiles are presented. CONCLUSION: The multicentric study, Biometry 2000, has established sonographic fetal charts derived from a large sample of scans and unselected pregnant women assuming a normal distribution.
Authors: Sarah Vanlieferinghen; Olivia Anselem; Camille Le Ray; Yao Shen; Louis Marcellin; François Goffinet Journal: PLoS One Date: 2015-04-13 Impact factor: 3.240