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

Yan Zhao1, Li Chen1, Lu-Xi Li1

  • 1Department of Environmental Health, School of Public Health, Fudan University, Shanghai, China.

Pediatric Research
|July 9, 2014
PubMed

Insights

Prenatal phthalate exposure is linked to a higher risk of intrauterine growth retardation (IUGR), especially in male newborns. Higher phthalate metabolite levels in mothers correlated with reduced fetal growth.

Area of Science:

  • Environmental Health
  • Reproductive Toxicology
  • Perinatal Medicine

Background:

  • No prior studies have investigated the link between prenatal phthalate exposure and intrauterine growth retardation (IUGR).
  • This research addresses the knowledge gap concerning phthalate exposure during pregnancy and its impact on fetal development.

Purpose of the Study:

  • To determine the association between prenatal phthalate exposure and the risk of developing IUGR.
  • To explore potential sex-specific differences in susceptibility to phthalate exposure regarding fetal growth.

Main Methods:

  • A case-control study involving 126 mother-newborn pairs (42 IUGR cases, 84 controls).
  • Maternal urine samples collected in the third trimester analyzed for five phthalate metabolites.
  • Phthalate metabolite concentrations were quantified using established laboratory techniques.

Main Results:

  • Elevated levels of monomethyl phthalate (MMP), mono(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP), mono(2-ethyl-5-oxohexyl) phthalate (MEOHP), and SumDEHP were found in IUGR cases.
  • Higher MEHHP and MEOHP concentrations were inversely associated with fetal growth indicators (birth weight, Quetelet's index) in the overall cohort.
  • A significant exposure-response relationship was observed between MEHHP/SumDEHP and IUGR; male infants showed greater sensitivity to phthalate exposure than females.

Conclusions:

  • Prenatal phthalate exposure is associated with an increased risk of intrauterine growth retardation.
  • Male newborns appear more vulnerable to the adverse effects of phthalate exposure on fetal growth compared to females.
  • Findings highlight the importance of monitoring and reducing phthalate exposure during pregnancy to improve perinatal outcomes.
Abstract

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