Division of Biomedical Sciences, Warwick Medical School, University of Warwick, Coventry, United Kingdom (S.Q., L.E., S.T.); University Hospital Coventry and Warwickshire NHS Trust, Coventry, United Kingdom (S.Q., L.E., S.T.); Warwick Clinical Trials Unit, University of Warwick, Coventry, United Kingdom (K.B., L.H.); Tommy’s National Centre for Miscarriage Research, Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, United Kingdom (A.C.); Department of Vascular Medicine, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, the Netherlands (P.G.d.J., E.N.H., T.F.v.H., S.M.); Amsterdam Cardiovascular Sciences, Pulmonary Hypertension and Thrombosis, Amsterdam, the Netherlands (P.G.d.J., E.N.H., T.F.v.H., S.M.); Department of Internal Medicine, Radboud University Medical Center, Nijmegen, the Netherlands (L.J.S., S.M.); Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, the Netherlands (L.J.S.); Centre for Reproductive Medicine, Department of Obstetrics and Gynaecology, Amsterdam Reproduction and Development Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, the Netherlands (M.G.); and Amsterdam Reproduction and Development Research Institute, Amsterdam, the Netherlands (M.G.)