Received: 10 September 2018
Accepted: 28 December 2018
First Online: 7 February 2019
: JB, Biochemistry student; AR, MSc student, AG, MSc, specialist in spermiogram analysis and sperm clinical preparation; AB, MD, PhD, Full Professor, Medical Genetics specialist, clinical director; MS, MD, PhD, Full Professor, Senior Clinical Embryologist, academic director of research; RS, PhD, Associated Professor, academic director of research, MD student.
: Ethical guidelines were followed in the conduct of research, with written informed consent obtained before the beginning of work. According to the National Law on Medically Assisted Procreation and the National Council on Medically Assisted Procreation guidelines no further authorizations were required.
: Not applicable.
: The authors declare that they have no competing interests.
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