出生缺陷是影响人口素质的主要因素之一,本文选取河南省61所县市级医院1997~2003年4214例出生缺陷儿的流行病学资料,总结出生缺陷的发生率及各种畸形的发生顺位,供临床参考。1资料与方法1.1对象调查对象为按照地理位置随机分层抽取的61所监测医院中住院分娩的孕满28周到出生后7 Birth defects are one of the main factors affecting the quality of the population. This paper chooses the epidemiological data of 4214 birth defects in 61 hospitals in Henan Province from 1997 to 2003, summarizes the incidence of birth defects and the occurrence of various deformities For clinical reference. 1 Materials and Methods 1.1 Subjects surveyed randomly selected according to the geographical location of the 61 monitored hospitals in the delivery of pregnant 28 weeks to 7