Singla S, Das B. Risk factor and perinatal outcome of preterm delivery in a tertiary care centre in rural Haryana. Int J Reprod Contracept Obstet Gynecol [Internet]. 2020 Sep. 25 [cited 2025 Nov. 25];9(10):4187-91. Available from: https://www.ijrcog.org/index.php/ijrcog/article/view/8941