Funding for this research was provided by:
Merck KGaA (Grant for Fertility Innovation)
Received: 26 February 2019
Accepted: 11 June 2019
First Online: 19 June 2019
: This study was approved by the Medical Research and Ethics committee of the National Maternity Hospital, Holles Street, Dublin (Reference EC 04.2016, 12th January 2016) and the Human Research Ethics Committee, University College Dublin (LS-15-51-OShea).
: Not applicable.
: The authors declare that they have no competing interests.