Zhonghua Yi Xue Za Zhi. 1993 Oct;73(10):587-9, 636.
24,150 newborn infants and their mothers from 15 cities were investigated by analysing maternal age, neonate birth weight, length, head circumference, chest circumference, crown-hip length and arm circumference so as to find out scientific evidences for encouraging women to be pregnant at a mature age and improving birth quality. The women aged 20 or younger showed that the physical development indexes of their babies were lower as compared with the women aged 21 or older, and the percentage of mature infant was lowest as compared with the other age groups. In contrast, women aged 24-34, the neonatal physical development indexes were the best and percentage of premature and postmature infants were the lowest, especially in the 24-29 age group.
对来自15个城市的24150名新生儿及其母亲进行了调查，分析了母亲年龄、新生儿出生体重、身长、头围、胸围、顶臀长和上臂围，以便为鼓励女性适龄生育和提高出生质量寻找科学依据。结果显示，20岁及以下的女性所生婴儿的身体发育指标低于21岁及以上的女性，且成熟婴儿的比例与其他年龄组相比最低。相比之下，24至34岁的女性所生新生儿的身体发育指标最佳，早产和过期产婴儿的比例最低，尤其是在24至29岁年龄组。
