胎儿宫内发育迟缓 (ＩＵＧＲ)指出生体重低于该孕周平均体重的第 10百分位数 ,新生儿大部分是小于胎龄儿(ＳＧＡ) ,发生率约 3%10 %。ＩＵＧＲ在孕期、产时发生胎儿窘迫、新生儿窒息以至死亡的危险性高 ,可导致高围生儿病率 ,围生儿病死率比正常体重儿高 46倍。根据美国对15 6 Intrauterine growth retardation (IUGR) indicates that the birth weight is below the 10th percentile of the mean gestational age, most of the newborns are less than gestational age (SGA) and the incidence is about 3% to 10%. IUGR during pregnancy and childbirth during fetal distress, neonatal asphyxia and high risk of death can lead to high perinatal morbidity, perinatal mortality 46 times higher than normal children. According to the U.S. on 15 6