This opinion paper was produced on behalf of the Royal College of Obstetricians and Gynaecologists by: Dr NR Vulliemoz, Institute of Reproductive Sciences, Oxford, Mr E McVeigh FRCOG, Oxford and Dr J Kurinczuk MD MSc FFPH, National Perinatal Epidemiology Unit, Oxford
and peer-reviewed by:
Mr PRS Brinsden FRCOG, President, British Fertility Society; Professor T Fleming, Professor of Developmental Biology Southampton; Professor AH Balen FRCOG, Leeds; Professor MD Kilby FRCOG, President, BMFMS.
The Scientific Advisory Committee lead reviewer was:
Professor SM Nelson MRCOG, Glasgow.
The final version is the responsibility of the Scientific Advisory Committee of the RCOG.
The review process will commence in 2015 unless otherwise indicated.