Background Public funding for fertility services within the United Kingdom is limited, and
therefore, strict guidance exists regarding who can be offered treatment under the National …

Background The rate of successful pregnancies brought to term has barely increased since
the first assisted reproductive technology (ART) technique became available. Vasodilators …

Recurrent implantation failure (RIF) is defined as the absence of a positive pregnancy test
after three consecutive transfers of good quality embryos. There remains significant variation …

STUDY QUESTION What is the association between BMI and subfertility? SUMMARY
ANSWER We observed a J-shaped relationship between BMI and subfertility in both sexes …

Background: Female overweight/obesity has been reported to be associated with
compromised pregnancy outcomes in fresh embryo transfer cycles. It is unclear whether the …

Background Few studies have investigated associations between adiposity and
reproductive factors using causal methods, both of which have a number of consequences …

Purpose This study aimed to develop a risk prediction of fertilization disorders during the in
vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI). Methods A retrospective study …

Objective To investigate the association between pre-pregnancy body mass index (BMI) and
miscarriages in women who required assisted reproductive technology (ART) for …

Background Underweight and overweight may affect reproduction and interfere with
treatment of infertility. In the present retrospective analysis, we sought to evaluate the effect …

Research question Does maternal preconceptional body mass index (BMI) associate with
mean blastocyst euploidy rate (m-ER) per patient and live birth rate (LBR) after vitrified …