1. From the University Medical Center Utrecht, Division of Woman and Baby, Department of Obstetrics, Utrecht, The Netherlands (J.H.W.V., J.G.S., M.P.H.K., E.D.P.U., B.B.v.R., S.V.K., A.F.); and Princess Anne Hospital, Obstetrics and Gynaecology, Division of Human Development and Health, University of Southampton, Southampton, United Kingdom (B.B.v.R.).