Shihabudeen, Thasneem. “The Effect of Intrauterine Human Chorionic Gonadotrophin Injection before Embryo Transfer on the Implantation and Pregnancy Rate in Infertile Patients: A Retrospective Study”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 12, no. 1 (December 28, 2022): 108–113. Accessed October 12, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/11820.