Ounsted M, Moar V A
Acta Paediatr Scand. 1986 Sep;75(5):811-8. doi: 10.1111/j.1651-2227.1986.tb10295.x.
Data on 55 small-for-gestational age (SGA), 56 average-for-gestational age (AGA) and 55 large-for-gestational age (LGA) infants whose growth had been monitored regularly from birth to 12 months are presented. SGA head-chest ratios were high at birth; but by 6 months they were very similar to AGA ratios, with values just below unity. Head-length ratios showed a steady decrement; SGA infants having the highest and LGA infants the lowest values at all ages. Chest-length ratios showed little change up to 6 months, with a steady decrease thereafter. Stem-stature ratios showed a similar pattern; and were confined within a narrow margin from 6 months onwards. These changes seem to be target orientated. We suggest the goal is that proportionality which enables the infant to attain the upright stature; and thus to sit, stand and walk at the appropriate time.
本文呈现了55例小于胎龄儿（SGA）、56例适于胎龄儿（AGA）和55例大于胎龄儿（LGA）从出生到12个月期间生长情况的定期监测数据。SGA患儿出生时头胸比高；但到6个月时，他们与AGA患儿的头胸比非常相似，数值略低于1。头长比呈稳步下降；SGA患儿在各年龄段的头长比最高，LGA患儿最低。胸长比在6个月前变化不大，此后稳步下降。茎干与身高比呈现类似模式；从6个月起局限在一个狭窄范围内。这些变化似乎是目标导向的。我们认为目标是实现比例协调，使婴儿能够获得直立姿势；从而在适当的时候坐、站和行走。
