Bahgat NA. Relation between maternal vitamin D level and in vitro-fertilization laboratory outcome in normal responding patients 35 years old or less. Int J Reprod Contracept Obstet Gynecol [Internet]. 2022 Oct. 28 [cited 2025 Dec. 4];11(11):2943-7. Available from: https://www.ijrcog.org/index.php/ijrcog/article/view/12256