Oh, Sung-Tack, and Bum-Chae Choi. “Prophylactic Single-Dose Systemic Methotrexate Therapy for High-Risk Group in Persistent Ectopic Pregnancy After Laparoscopic Conservative Surgery of Tubal Pregnancy”. International Journal of Social Sciences and Humanities Invention 10, no. 12 (December 5, 2023): 8066–8069. Accessed June 16, 2024. https://www.valleyinternational.net/index.php/theijsshi/article/view/4674.