S. S. Patne, A. J. Upadhye, S. C. Shembekar, C. A. Shembekar, and J. J. Upadhye, “Antenatal screening for aneuploidy”, Int J Reprod Contracept Obstet Gynecol, vol. 7, no. 1, pp. 234–238, Dec. 2017.