为准确掌握新生儿出生缺陷发生情况，获得合肥市出生缺陷发生的有关资料，我们对１９９６至１９９８年合肥市省、市级共１０家医院妇产科新生儿出生缺陷监测的资料从频率指标的角度进行分析。１　资料与方法１．１　研究对象　凡在合肥市１０家监测医院出生的新生儿均进行监测 To accurately grasp the birth defects of newborns and to get the relevant data of birth defects in Hefei, we analyzed the data of birth defects monitoring of neonates with obstetrics and gynecology in 10 hospitals in Hefei from 1996 to 1998 from the frequency index Angle analysis. 1 Materials and Methods 1.1 Subjects All newborns born in 10 monitoring hospitals in Hefei City were monitored