为了提高围产期保健水平,提高新生儿的生存力,产科医师往往要判定产妇是早产还是过期产,有时为了防止产科并发症,如高血压、心脏痛、肝病等不能继续妊娠,需终止妊娠者,但又必须考虑新生儿的存活力,所以预产期的正确与否是极为重要的。目前虽然医师能通过临床检查、B超和生化测定。能推算新生儿成熟度,但产妇本人的 In order to improve perinatal health care and improve the viability of newborns, obstetricians often determine whether the mother is premature or overdue, and sometimes to stop obstetric complications such as high blood pressure, heart pain, liver disease can not continue the pregnancy, termination of pregnancy However, we must consider the viability of the newborn, so the correct date of birth is very important. Although doctors can pass the current clinical examination, B ultrasound and biochemical tests. Can calculate the newborn’s maturity, but the maternal own