Meliana, A., Salsabila, H., Witarto, B.S. and Wahyunitisari, M.R. 2022. The role of adequate vitamin D levels in the menstrual cycle of reproductive-age women. Majalah Obstetri & Ginekologi. 30, 3 (Dec. 2022), 154–160. DOI:https://doi.org/10.20473/mog.V30I32022.154-160.