Abstract: Objectives: To investigate association between prenatal and early postnatal exposures to 12 phenols, 13 phthalates and 2 non-phthalate plasticizer metabolites and fat mass percent at three years of age among 341 couple mother-child from the SEPAGES cohort. To assess effect modification by sex. Methods: Pregnant women had to collect three urine samples a day for seven consecutive days, twice during pregnancy, and collect one urine sample a day for seven consecutive days for children around 2 and 12 months. Children had a clinical exam around three years of age. We used Goran equation to computed fat mass percent. Results: Prenatal exposures to bisphenol S, mono-benzyl phthalate, monoethyl phthalate, mono-n-butyl phthalate were positively associated with percent fat mass. Triclosan was negatively associated with fat mass percent. Different phthalates showed an effect modification by sex, after gender stratification, associations were stronger among girls. There are no significant results for postnatal exposures. Conclusion: This study highlights associations between prenatal exposures and percent fat mass in preschool children. Our paper is the first studying association of prenatal exposure to bisphenol S and child adiposity in human. ; Objectif : Étudier l’association entre les expositions prénatales et postnatales à 12 phénols, 13 métabolites du phtalate et 2 métabolites de plastifiants non-phtalates et du pourcentage de masse grasse à trois ans chez 341 couples mère-enfant de la cohorte SEPAGES. Investiguer une différence selon le sexe de l’enfant. Méthodes : Les mères ont collecté leurs urines trois fois par jour pendant sept jours consécutifs à deux moments de grossesse et celles de leurs enfants au deuxième mois et à un an pendant sept jours consécutifs. Les enfants ont eu un examen clinique à trois ans. Résultats : L’exposition prénatale aux bisphénol S, mono-benzyl phtalate, monoethyl phtalate, mono-n-butyl phtalate était associée au pourcentage de masse grasse à trois ans. L’exposition prénatale au ...
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