Karki, S., Joshi, K., Tamrakar, S., Regmi, S. and Khanal, K. (2015) “Nuchal Translucency in Normal Fetus and Its Variation With Increasing Crown Rump Length (Crl) and Gestational Age”, Kathmandu University Medical Journal, 11(4), pp. 282–286. doi: 10.3126/kumj.v11i4.12522.