Sengodan SS, Velumani S. Amniotic fluid optical density at spontaneous onset of labour and it’s correlation with gestational age, birth weight and functional maturity of newborn. Int J Reprod Contracept Obstet Gynecol [Internet]. 2020 Nov. 26 [cited 2025 Oct. 13];9(12):5060-4. Available from: https://www.ijrcog.org/index.php/ijrcog/article/view/9278