Ancri G, Morse E H, Clarke R P
Am J Clin Nutr. 1977 Apr;30(4):568-72. doi: 10.1093/ajcn/30.4.568.
Factors influencing the outcome of pregnancy were studied in 98 women, ages 12 to 32, divied into four age groups. A significantly higher weight gain was recorded for the youngest age group and the lowest gain for the oldest age group. The amount of weight gained was a function of length of gestation, but was not influenced by calorie intake of the mother. Neither was there significant correlation between protein and calorie intake of the mother and the infant's birth weight. Mean calorie intakes averaged below and mean protein intakes above the 1974 RDA. About 10% of the infants weighed less than 2,500 g and no single factor could be identified as the cause of low birth weight.
对98名年龄在12至32岁之间的女性进行了研究，她们被分为四个年龄组，以探讨影响妊娠结局的因素。最年轻年龄组的体重增加显著更高，而最年长年龄组的体重增加最低。体重增加量是妊娠期长短的函数，但不受母亲卡路里摄入量的影响。母亲的蛋白质和卡路里摄入量与婴儿出生体重之间也没有显著相关性。平均卡路里摄入量低于1974年推荐膳食摄入量（RDA），平均蛋白质摄入量高于该标准。约10%的婴儿体重低于2500克，且无法确定单一因素为低出生体重的原因。
