Stillbirth is the final outcome of maternal，fetal and placental diseases under various risk factors. The predictive value of stillbirths due to impaired placentation using a combination of maternal factors，fetal biometry，uterine artery Doppler and maternal serum placenta growth factor during the first and  second trimester was high，but it is limited  for term stillbirths.Correct identification of high-risk factors of stillbirth，strengthening the management of preconception and pregnancy in high-risk groups，using various prenatal monitoring methods effectively and timely delivery can  reduce the occurrence of stillbirth.