2500g

1

For babies less than 37 weeks in fetal age with a weight less than 2500g , mortality rate was highest in breech extractions .

孕周<37周，体重<2500克，臀位牵引的胎儿死亡率最高。
2

Via the investigation of 424 children under 6 years old among 420 citizen family , the outcome showes it has 13 children , their weight below 2500g when they were born percentage is 3.07 % .

目的本文通过对420户居民中的424名6岁以下儿童的营养监测调查分析，结果被调查儿童出生体重低于2500克有13名，占3.07%；按年龄、性别低体重患病率为0.2%；
3

The incidences of intrauterine growth retardation ( IUGR ), low birth-weight infants ( < 2500g ), congenital malformations infants in intervention group with 10.5mg/d of zinc supplement were significantly lower than control group .

干预组的胎儿宫内发育迟缓（IUGR）、低体重儿的发生率低于对照组，P均小于0.01；干预组的先天畸形发生率低于对照组，P<0.05。