Dudhrejia K, Karena ZV, Patel RP. A prospective study of maternal factors and perinatal outcome of preterm birth. Int J Reprod Contracept Obstet Gynecol [Internet]. 2019 Dec. 26 [cited 2025 Dec. 4];9(1):129-33. Available from: https://www.ijrcog.org/index.php/ijrcog/article/view/7688