title: Phthalate exposure and reproductive hormone concentrations in pregnancy.
abstract: Some phthalate chemicals can affect hormone physiology in utero, resulting in adverse reproductive health outcomes in animal models. It is unknown whether these exposures are related to circulating maternal hormone concentrations during pregnancy. We used multivariate linear regression to estimate associations between phthalate metabolite concentrations and concurrent serum-free and total testosterone and estradiol (E2) levels in 180 pregnant women in the Study for Future Families. We also examined associations between prenatal serum hormone concentrations and anogenital outcome in infants. All analyses were adjusted for appropriate confounding variables. Total testosterone, free testosterone, and E2 concentrations ranged from 8 to 406 ng/dl, 0.03 to 1.2 ng/dl, and 529 to 40 600 pg/ml respectively. We observed an inverse association between log-sum di-2-ethylhexyl phthalate (DEHP) metabolite concentrations and lower log-total testosterone concentrations (-0.15, 95% CI -0.26, -0.04) and log-free testosterone (-0.15, 95% CI -0.27, -0.03). This relationship persisted regardless of fetal sex. Similarly, we observed an inverse association between log monobutyl phthalate (MBP) concentrations and log-total and -free testosterone concentrations in women carrying male fetuses. Monoethyl phthalate (MEP) concentrations were positively associated with log-total and -free testosterone concentrations in women carrying male fetuses (0.09, 95% CI 0.003, 0.17 and 0.10, 95% CI 0.01, 0.19 respectively). Prenatal hormone concentrations were not significantly associated with infant anogenital outcomes. Our preliminary data suggest that DEHP metabolite, MBP, and MEP exposures during pregnancy are associated with prenatal sex steroid hormone concentrations, but sex steroid hormone concentrations were not associated with infant reproductive outcomes.
authors.affiliation: Department of Pediatrics, University of Washington, 2001 West 8th Avenue, Seattle, Washington 98121, USA.
authors.forename: Sheela
authors.initials: S
authors.lastname: Sathyanarayana
authors.forename: Emily
authors.initials: E
authors.lastname: Barrett
authors.forename: Samantha
authors.initials: S
authors.lastname: Butts
authors.forename: Christina
authors.initials: C
authors.lastname: Wang
authors.forename: Shanna Helen
authors.initials: SH
authors.lastname: Swan
mesh_terms: D000328:Adult; D015331:Cohort Studies; D004785:Environmental Pollutants / Q000097:blood / Q000633:toxicity / Q000652:urine; D005260:Female; D012739:Gonadal Steroid Hormones / Q000097:blood* / Q000652:urine; D006801:Humans; D008297:Male; D018811:Maternal Exposure; D010795:Phthalic Acids / Q000097:blood / Q000633:toxicity* / Q000652:urine; D011247:Pregnancy / Q000097:blood* / Q000187:drug effects / Q000652:urine*; D011297:Prenatal Exposure Delayed Effects / Q000097:blood* / Q000652:urine*; D055815:Young Adult
chemical_list: D004785:Environmental Pollutants; D012739:Gonadal Steroid Hormones; D010795:Phthalic Acids; C032279:phthalic acid