1. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Centre (N.M., N.O., A.A.), University of Toronto, Toronto, Ontario, Canada.
2. Department of Genetics, North York General Hospital, Toronto, Ontario, Canada (T.H.).
3. Better Outcomes Registry & Network (BORN) Ontario, Canada (T.H., M.A., K.E.A.).
4. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, North York General Hospital (E.M.-D.), University of Toronto, Toronto, Ontario, Canada.
5. Division of Maternal-Fetal Medicine, Departments of Obstetrics and Gynecology, Radiology, and Research Methods, Evidence & Impact (S.D.M., B.M.-D.), McMaster University, Hamilton, Ontario, Canada.
6. Departments of Medicine and Obstetrics and Gynaecology, St. Michael’s Hospital (J.G.R.), University of Toronto, Toronto, Ontario, Canada.
7. Departments of Obstetrics and Gynecology (J.B.), McMaster University, Hamilton, Ontario, Canada.
8. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Mount Sinai Hospital (J.K.), University of Toronto, Toronto, Ontario, Canada.
9. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, St. Michael’s Hospital (H.B.), University of Toronto, Toronto, Ontario, Canada.