The Korean Society of Maternal-Fetal Medicine has released fact sheets providing medical evidence on 'twin pregnancy', 'causes of cerebral palsy', 'pregnancy after uterine surgery', and 'taking Tylenol during pregnancy' to alleviate the concerns of pregnant women. Twin pregnancies have a higher risk of preterm birth and low birth weight than singleton pregnancies, so single embryo transfer is recommended. Cerebral palsy can be caused by a variety of factors, including oxygen deprivation during delivery, and the entire process from pregnancy to childbirth must be considered. Pregnancy after uterine surgery has a higher risk of complications such as uterine rupture and placenta accreta, so careful management is necessary. The causal relationship between Tylenol use during pregnancy and autism has not been established, and ignoring high fever or pain can be more dangerous.