Gender-specific relationship between prenatal exposure to phthalates and intrauterine growth restriction.

Abstract:

BACKGROUND:No study has examined the association between prenatal phthalate exposure and intrauterine growth retardation (IUGR). This study aimed to investigate whether prenatal exposure to phthalates was associated with increased risk of IUGR. METHODS:A total of 126 mother-newborn pairs, including 42 IUGR cases and 84 control newborns and their mothers, were enrolled in this case-control study. Spot urine samples were collected during the third trimester of pregnancy, and 5 phthalate metabolites (mono-n-butyl phthalate (MBP), monomethyl phthalate (MMP), mono-2-ethylhexyl phthalate (MEHP), mono(2-ethyl-5-oxohexyl) phthalate (MEOHP), and mono(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP)) were measured. RESULTS:Concentrations of MMP, MEHHP, MEOHP, and SumDEHP (MEHP, MEHHP, and MEOHP) were significantly higher in IUGR cases than in normal controls. In all subjects, urinary concentrations of MEHHP and MEOHP were significantly inversely associated with fetal growth indicators (birth weight and Quetelet's index). When mothers were stratified by infant sex, MEHHP and MEOHP concentrations were still negatively associated with fetal growth indicators, while no significant association was observed in females. In addition, exposure-response relationships were observed between MEHHP/SumDEHP concentrations in maternal urine and IUGR. CONCLUSION:Prenatal exposure to phthalates was associated with increased risk of IUGR, and male newborns were more sensitive to phthalates than females.

journal_name

Pediatr Res

journal_title

Pediatric research

authors

Zhao Y,Chen L,Li LX,Xie CM,Li D,Shi HJ,Zhang YH

doi

10.1038/pr.2014.103

subject

Has Abstract

pub_date

2014-10-01 00:00:00

pages

401-8

issue

4

eissn

0031-3998

issn

1530-0447

pii

pr2014103

journal_volume

76

pub_type

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