“A Day 1 HCG Can Differentiate Non-Viable Intrauterine Pregnancy and Ectopic Pregnancy Following Endometrial Curettage ”. Annals of Medical Research 27, no. 5 (May 25, 2021): 1422–1427. Accessed April 3, 2025. http://annalsmedres.org/index.php/aomr/article/view/765.