Prenatal exposures and birth indices, and subsequent risk of polycystic ovary syndrome: a national registry‐based cohort study

To study the associations between prenatal exposures and risk of developing polycystic ovary syndrome (PCOS).National registry-based cohort study.Sweden.Girls born in Sweden during the years 1982-1995 (n = 681 123).The girls were followed until the year 2010 for a diagnosis of PCOS. We estimated the associations between maternal body mass index (BMI), smoking, and size at birth with the risk of developing a PCOS diagnosis. Risks were calculated...