Risk of adverse pregnancy outcomes stratified for pre-pregnancy body mass index.

OBJECTIVE To estimate the risk of adverse maternal and perinatal outcomes in women with different pre-pregnancy body mass index (BMI). METHODS We conducted a cohort study with 14 451 singleton pregnancies in 15 medical centers in Beijing between 20 June 2013 and 30 November 2013 using cluster random sampling. We divided participants into four groups based… CONTINUE READING