Stephen A Roberts

STUDY QUESTION: Has the average birthweight (BW) for singletons born in the UK through ART changed between 1991 and 2018 relative to the general population? SUMMARY ANSWER: The average gestation-adjusted BW for ART singletons increased ste…

STUDY QUESTION: Is patient consent to research associated with the distribution of population characteristics and study outcomes in ART cohort studies? SUMMARY ANSWER: The distribution of population characteristics in the patient consent s…

PURPOSE: To generate a large cohort of children born after assisted reproductive technology (ART) in the UK between 1992 and 2009, their naturally conceived siblings (NCS) and matched naturally conceived population (NCP) controls and linkin…

STUDY QUESTION: How much variation in oocyte yield after controlled ovarian stimulation (COS) can be accounted for by known patient and treatment characteristics? SUMMARY ANSWER: There is substantial variation in the COS responses of simil…

PURPOSE: Genetic variation may influence women's response to ovarian stimulation therapy. The purpose of this study was to investigate any effects of genetic variants in the anti-Müllerian hormone (AMH) and AMH type II receptor genes on ova…

Pelvic surgery can affect ovarian reserve, but estimates of the potential effect of different surgical procedures are lacking. This study examines the markers of ovarian reserve after different procedures in order to help the provision of i…

BACKGROUND: IVF treatments for infertility involve the transfer of multiple embryos in any one treatment cycle. When data is available on individual embryos the outcomes of each embryo are only partially observed, as treatment outcome (live…

PURPOSE: The objective of our study is to investigate the optimum number of stimulated intrauterine insemination (SIUI) or donor insemination (DI) cycles that can be offered to the couples prior to in vitro fertilization (IVF) or intracytop…