Prenatal phthalate exposure and pubertal development in 16-year-old daughters: reproductive hormones and number of ovarian follicles.

This article investigates the potential long-term associations between prenatal exposure to phthalates—endocrine-disrupting chemicals commonly found in consumer products—and reproductive outcomes in teenage daughters. Using data from the Copenhagen Mother–Child Cohort, the study analyzed phthalate metabolite concentrations in maternal serum during pregnancy and cord blood, relating these to reproductive hormone levels, uterine volume, and ovarian follicle counts in 317 daughters at a median age of 16 years. The findings revealed subtle associations, including higher prenatal phthalate exposure correlating with lower insulin-like growth factor 1 (IGF-1), higher luteinizing hormone (LH) levels, and smaller uterine volume, though results were sporadic and not uniformly consistent across analyses. Limitations include the use of single serum samples for exposure assessment, a relatively small sample size, and lack of control for other environmental exposures. The study underscores the need for further research on prenatal environmental chemical exposures and their potential impact on female reproductive development.