Sheik S, B. A. A study to assess predictive value of yolk sac diameter by transvaginal sonography with the pregnancy outcome. Int J Reprod Contracept Obstet Gynecol [Internet]. 2020 Feb. 27 [cited 2025 Dec. 4];9(3):997-1002. Available from: https://www.ijrcog.org/index.php/ijrcog/article/view/7913