Received: 15 October 2019
Accepted: 17 December 2019
First Online: 30 December 2019
Ethics approval and consent to participate
: Our study was approved by the ethical and scientific committee, Faculty of Medicine, Menoufia University.The patients were informed of the examination and gave a verbal informed consent to perform the examination. Written consent is not applicable as they already came seeking antenatal care ultrasonography examination by a written request from their physician
: All authors gave consent to publish the manuscript.
: The authors declare that they have no competing interests.