Peter, M., A. K. Nayak, P. P. Giri, and M. K. Jain. “Fetal Kidney Length As a Parameter for Determination of Gestational Age from 20th Week to Term in Healthy Women With Uncomplicated Pregnancy”. International Journal of Research in Medical Sciences, vol. 5, no. 5, Apr. 2017, pp. 1869-73, doi:10.18203/2320-6012.ijrms20171808.