近年来低出生体重儿对小儿健康和智力的影响,已引起国内外的充分重视.为减少低体重儿的出生,就其发生的原因作一介绍.一、妊娠前因素:①母亲的年龄:竹村等研究结果表明,年轻和高龄初产妇未成熟儿的发生率增高.国内有人研究指出,母亲年龄为25～29岁,分娩的低体重儿百分率最低(6.1%),而小于20或≥55岁者最高(10.3%).②母亲身高和体重:一般情况下母亲高大婴儿亦大,母亲矮小、体重轻者,低体重儿的发 In recent years, the impact of low birth weight infants on children’s health and intelligence has attracted enough attention at home and abroad .In order to reduce the birth of low birth weight infants, make an introduction on the causes of their occurrence.First, factors of pregnancy: ①The age of the mother: The results of studies such as Takemura showed that the incidence of immature infants in young and old primiparous women increased.Recent studies have shown that mothers aged 25 to 29 years, the lowest percentage of birth weight children (6.1%), while less than 20 or ≥ 55 The highest age (10.3%). ② Mother’s height and weight: In general, mothers tall infants are also large, mother short, light weight, low birth weight children’s hair