1. Department of Reproductive Medicine (O.R., C.F.), St Mary's Hospital, Central Manchester University Hospital National Health Service (NHS) Foundation Trust, Manchester Academic Health Science Centre (MAHSC), Manchester M13 0JH, United Kingdom
2. Department of Clinical Biochemistry (A.S., A.P.Y., P.W.P.), Central Manchester University Hospitals NHS Foundation Trust, Manchester M13 9WL, United Kingdom
3. Centre for Biostatistics (S.A.R.), Institute of Population Health, MAHSC, University of Manchester, Manchester M13 9PL, United Kingdom
4. Manchester Royal Infirmary (M.K.), Central Manchester University Hospitals NHS Foundation Trust, Manchester M13 9WL, United Kingdom
5. Reproductive Medicine and Gynecology Unit (L.G.N.), GyneHealth, Manchester M3 4DN, United Kingdom