1. Department of Maternal fetal Medicine King Khalid University Hospital Riyadh Saudi Arabia
2. Department of Obstetrics & Gynaecology College of Medicine King Saud University Riyadh Saudi Arabia
3. Department of Maternal‐Fetal Medicine Royal Hospital for WomenRandwick New South Wales Australia
4. Division of Women's and Children's Health University of New South Wales Randwick New South Wales Australia
5. Australian Centre for Perinatal Science University of New South Wales Randwick New South Wales Australia