Kashyap, N., M. Pradhan, S. Yadav, and N. Singh. “Invasive Prenatal Diagnostic Procedures: A Developing countries’ Perspective”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 5, no. 1, Dec. 2016, pp. 41-47, doi:10.18203/2320-1770.ijrcog20151492.