Jassim, Shaimaa, and Raid M. H. Al-Salih. “Role of Folic Acid, Vitamin D, and Progesterone in Pregnancy and Threatened Abortion”. University of Thi-Qar Journal of Science 10, no. 2 (December 22, 2023): 27–32. Accessed March 29, 2025. https://jsci.utq.edu.iq/index.php/main/article/view/1066.