Kara, O.; Gencosmanoglu Turkmen, G.; Korkut Daglar, H.; Yasar Sanhal, C.; Laleli Koc, B.; Yucel, A.; Sahin, D. A Day 1 HCG Can Differentiate Non-Viable Intrauterine Pregnancy and Ectopic Pregnancy Following Endometrial Curettage . Ann Med Res 2021, 27 (5), 1422-1427.