Pregnant women with polycystic ovary syndrome (PCOS) are at increased risk of pregnancy-related disorders such as gestational diabetes (GDM), gestational hypertension and preeclampsia in the 2nd and 3rd trimester. In addition, the risk of preterm birth, children who are small and large for gestational age, caesarean section and poorer neonatal outcome seem to be elevated, however with less clear evidence. Except for the screening for GDM, there is no evidence of a benefit of increased surveillance during pregnancy for women with PCOS.