Received: 12 November 2019
Accepted: 31 December 2019
First Online: 15 January 2020
Ethics approval and consent to participate
: Ethical approval was obtained from The Internal Ethical committee of the Egyptian IVF Center in December 2014 (approval number: 2014/017). Written informed consent was obtained from every patient who participated in the research.
: Not applicable
: The authors declare that they have no competing interests.