1King Edward Memorial Hospital, Perth, Western Australia, Australia

2Division of Obstetrics and Gynaecology, University of Western Australia, Perth, Western Australia, Australia

Reprint requests to: Dr Jennifer C. Pontré, MBBS, FRANZCOG, MRepMed, King Edward Memorial Hospital, 374 Bagot Rd, Perth, Western Australia, Australia. E-mail: [email protected]

The corresponding author confirms that she had final responsibility for the decision to submit for publication.

The authors have declared they have no conflicts of interest.

Authorship Statement: All coauthors have seen and approved the final version of the article and have agreed to its submission for publication.

IRB status: Ethical approval was granted for the study by the local institutional review board (IRB approval number 29125) on May 10, 2019.