Rozina Memon’, Saira Parveen2, Afra Rehman , Yasmeen Joyo4, Mehnaz Akram Shaikh5. 2012. “ Diagnostic Accuracy of Ultrasound in Determination of Chorionicity of Twin Pregnancies at PMCH Nawabshah”. Journal of Peoples University of Medical &Amp; Health Sciences Nawabshah. (JPUMHS) 9 (4):50-54. http://121.52.155.46/index.php/ojs/article/view/477.