Neuroendocrine Disruption of Reproduction by Bisphenols and Phthalates: From Molecular Mechanisms to Reproductive Outcomes

Bisphenols and phthalates are ubiquitous endocrine-disrupting chemicals with potential effects on reproductive neuroendocrine regulation, particularly during sensitive developmental windows. This review summarizes current evidence on their exposure profile, mechanisms of reproductive disruption, and female- and male-specific reproductive adversities. A structured narrative review was conducted using PubMed/MEDLINE, Scopus, and Web of Science, including experimental, epidemiological, biomonitoring, systematic review, and meta-analytic studies addressing bisphenols, phthalates, fertility, hormonal regulation, gametogenesis, pregnancy outcomes, and reproductive toxicity mechanisms. Bisphenols and phthalates interfere with estrogenic and androgenic signaling, hypothalamic–pituitary–gonadal axis regulation, steroidogenesis, oxidative stress, inflammation, apoptosis, mitochondrial function, and epigenetic regulation. Reported outcomes include impaired ovarian function, altered oocyte development, hormonal imbalance, reduced semen quality, defective spermatogenesis, sperm DNA damage, infertility, and adverse developmental or pregnancy-related effects. However, human evidence remains heterogeneous and limited by observational designs, exposure misclassification, residual confounding, and insufficient mixture assessment. Current evidence supports biological plausibility for bisphenol- and phthalate-related reproductive toxicity, but causal inference remains limited. Prospective studies with repeated biomonitoring, standardized reproductive endpoints, sex- and age-specific analyses, and improved mixture modeling are needed. A precautionary reduction in avoidable exposure appears reasonable, particularly during sensitive reproductive and developmental periods.