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Sex differences in the effects of prenatal lead exposure on birth outcomes

Ju Wang1, Zhen-Yan Gao2, Jin Yan2

  • 1School of Public Health, Shanghai Jiao Tong University, Shanghai, China; Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.

Environmental Pollution (Barking, Essex : 1987)
|April 4, 2017
PubMed

Insights

Prenatal lead exposure shows sex-specific effects on infant birth outcomes. Cord blood lead levels were linked to head circumference in males and ponderal index in females, with maternal diet as a potential factor.

Area of Science:

  • Environmental Health
  • Perinatal Epidemiology
  • Toxicology

Background:

  • Inconsistent findings exist regarding prenatal lead exposure and birth outcomes.
  • Limited data address sex differences in these associations.
  • Lead exposure remains a significant public health concern.

Purpose of the Study:

  • To investigate the association between cord blood lead levels and various birth outcomes.
  • To examine potential sex differences in these associations.
  • To explore the role of maternal dietary intake as a confounder.

Main Methods:

  • Cord blood lead levels were measured in 1009 mother-infant pairs in Shanghai.
  • Associations with birth weight, length, head circumference, and ponderal index were analyzed.
  • Analyses were conducted for the total sample and within male and female subgroups.

Main Results:

  • Prenatal lead exposure was inversely associated with head circumference in males.
  • Lead exposure was associated with decreased ponderal index in females.
  • Male birth weight showed a positive association with lead levels, potentially confounded by maternal diet.

Conclusions:

  • Prenatal lead exposure may exert sex-specific effects on infant development.
  • Maternal dietary habits could influence the relationship between lead exposure and birth outcomes.
  • Further research is crucial to understand these complex interactions.

Keywords:
Birth outcomesLeadPrenatal exposureSex difference

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