ASSOCIATION BETWEEN VITAMIN D DEFICIENCY AND PREMATURE OVARIAN AGING: A CROSS-SECTIONAL STUDY

Vitamin D deficiency has been increasingly linked to ovarian dysfunction and premature ovarian aging (POA). This study aims to assess the relationship between serum vitamin D levels and ovarian reserve markers among reproductive-age women. A total of 140 women aged 22–38 years were evaluated for serum 25(OH)D, AMH, FSH, and estradiol levels. Vitamin D deficiency (<20 ng/mL) was significantly associated with lower AMH and higher FSH, suggesting that vitamin D insufficiency may accelerate ovarian aging through endocrine and oxidative mechanisms.