Molteni R A, Stys S J, Battaglia F C
J Reprod Med. 1978 Nov;21(5):327-34.
Two thousand consecutive deliveries occurring over an 11-month period were studied for fetal and placental (F/P) weight characteristics. Infant and placental weight pairs were analyzed according to their gestational ages and growth categories (AGA, SGA, LGA). Graphs were constructed to depict normal placental weight gain and F/P ratio changes over a wide range of gestational ages (23 to 43 weeks). Mean placental weights and F/P ratios continued to increase through 42 weeks' gestation in the AGA and LGA groups, though placental weight showed no change in the SGA group after 36 weeks. F/P ratio continued to increase in the SGA group and was indistinguishable from that of the other two groups. Fetal and placental weight were linearly related in the total sample as well as in the individual growth categories. However, when F/P ratio was plotted against placental weight, the infants were segregated into three completely distinct curves, depending upon their growth characteristics. A wide range of placental weight and f/p ratios existed within all three infant birth weight groups. When one-minute Apgar scores were considered, infants with F/P ratios of greater than 10.00 had significantly higher risks of an Apgar score of less than 6.
对11个月内连续发生的2000例分娩进行了胎儿和胎盘（F/P）重量特征研究。根据婴儿和胎盘重量对的孕周和生长类别（适于胎龄儿、小于胎龄儿、大于胎龄儿）进行分析。绘制图表以描述在广泛的孕周（23至43周）内正常胎盘重量增加和F/P比值变化。在适于胎龄儿和大于胎龄儿组中，平均胎盘重量和F/P比值在妊娠42周前持续增加，尽管小于胎龄儿组在36周后胎盘重量无变化。小于胎龄儿组的F/P比值持续增加，与其他两组无差异。胎儿和胎盘重量在总样本以及各个生长类别中呈线性相关。然而，当绘制F/P比值与胎盘重量的关系图时，根据婴儿的生长特征，婴儿被分为三条完全不同的曲线。在所有三个婴儿出生体重组中都存在广泛的胎盘重量和F/P比值范围。当考虑1分钟阿氏评分时，F/P比值大于10.00的婴儿阿氏评分低于6分的风险显著更高。
