Karya U, Kumari S, Rani A, Singh S. Clinical significance of unexplained elevated maternal serum alpha feto-protein in second trimester of pregnancy. Int J Reprod Contracept Obstet Gynecol [Internet]. 2018 May 26 [cited 2025 Oct. 14];7(6):2245-50. Available from: https://www.ijrcog.org/index.php/ijrcog/article/view/4714