1 Obstetrics and Gynecology, Weill Cornell Medicine, Qatar; Obstetrics and Gynaecology, University of Leicester, UK; Feto-Maternal Centre, Al Markhiya Street, Doha, Qatar. Electronic address: jck4@leicester.ac.uk.
2 Obstetrics and Gynecology, Weill Cornell Medicine, Qatar; Obstetrics and Gynaecology, Qatar University, Qatar; Feto-Maternal Centre, Al Markhiya Street, Doha, Qatar.