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本文报告了我国南北方12城市早产、足月产、过期产三组适于胎龄儿（AGA儿）从出生至2个月时体格发育六项指标（体重、身长、顶臀长、头围、胸围、上臂围）的纵向监测值以及新生儿期、第2个月累积增长情况和过期增长情况，其中以体重、上臂围增长幅度最明显。多数指标及多数时点实测值显示为过期产AGA儿＞足月产AGA儿＞早产AGA儿，且多数组间比较有统计学意义。而增长速率却显示早产AGA儿＞足月及过期产AGA儿。
This article reports six indicators of body development (body weight, body length, top-rump length, head circumference of AGA children from birth to 2 months) in 12 cities in North and South of China. , Chest circumference, upper arm circumference), as well as the cumulative growth and expiration of neonatal period, the second month of growth, with the most obvious increase in body weight and upper arm circumference. Most of the indicators and most of the time point of the measured value showed that the AGA children with expired> AGA infants born> premature AGA children, and most of the groups were statistically significant. However, the rate of growth shows that preterm AGA infants> AGA infants and expired children.