Mohammed, Ali Hassan, et al. “Prediction of Pregnancy Outcome Using HCG, CA125 and Progesterone in Cases of Habitual Abortions”. Diyala Journal of Medicine, vol. 5, no. 2, Nov. 2019, pp. 62-67, https://djm.uodiyala.edu.iq/index.php/djm/article/view/381.