Yibrah Berhe Zelelow, Hagos Gidey Mihretu, and Tewelde Tesfaye Gebremariam. “Spontaneous Heterotopic Pregnancy (Case Report)”. East African Journal of Health Sciences 1, no. 2 (June 11, 2019): 181–183. Accessed September 18, 2025. https://journal.mu.edu.et/index.php/eajhs/article/view/325.