Zbalah, Hasan Falah, and Bushra Abbas Al-Zubaidi. “Investigation of Kisspeptin Hormone and Vitamin D3 Levels in Infertile Men”. International journal of health sciences 6, no. S10 (October 19, 2022): 422–428. Accessed June 27, 2026. https://sciencescholar.us/journal/index.php/ijhs/article/view/13492.