Sheik, S. and B., A. 2020. A study to assess predictive value of yolk sac diameter by transvaginal sonography with the pregnancy outcome. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 9, 3 (Feb. 2020), 997–1002. DOI:https://doi.org/10.18203/2320-1770.ijrcog20200863.