Eman Adel Bastawi, Mohamed M. Shaaban, Eman Ahmed Keshk and Asmaa M. Elgedawy (2023) “The Yolk Sac Abnormalities, Maternal Serum Level of Cancer Antigen 125 (CA-125) and Beta Human Chorionic Gonadotropin (B-HCG) as an Early Predictors of First Trimester Pregnancy Loss in Patients with Threatened Miscarriage”, Journal of Advanced Zoology, 44(S6), pp. 1205–1213. doi: 10.17762/jaz.v44iS6.2405.