The main risks of multiple pregnancies are miscarriage in early pregnancy, preterm delivery in late pregnancy, susceptibility to gestational hypertension during pregnancy, gestational diabetes, twin-birth transfusion syndrome, intrauterine stillbirth, postpartum hemorrhage in pregnant women and other adverse effects. When IVF embryos are transferred, 2-3 embryos are normally transferred, which increases the risk of adverse multiple pregnancies in pregnant women. Premature delivery in late pregnancy and the risk of cerebral palsy and neonatal ischemic encephalopathy after preterm delivery; pregnant women with multiple pregnancies are prone to anemia, severe pregnancy vomiting, overload of the heart and other physiological reaction phenomena.