Flecknell P A, Wootton R, Cooper J E, John M, McFadyen I R
Biol Neonate. 1980;37(3-4):186-91. doi: 10.1159/000241272.
Body and organ weights were measured in piglets from 44 litters which had been delivered by caesarean section at various times during the last 20 days of gestation. An attempt has been made to assess the usefulness of these measurements as predictors of gestational age. In this series of animals there was a highly significant correlation between mean litter weight and age. However, a considerable degree of uncertainty about the true gestational age must be accepted if mean litter weight is to be used as the sole predictor: at a mean litter weight of 1 kg, the 95% confidence limits were found to be +/- 10.2 days. No extra information was afforded by the inclusion of the organ weight data one the mean litter weight was known.
对来自44窝仔猪的体重和器官重量进行了测量，这些仔猪是在妊娠最后20天的不同时间通过剖腹产分娩的。已尝试评估这些测量作为胎龄预测指标的有用性。在这一系列动物中，平均窝重与年龄之间存在高度显著的相关性。然而，如果将平均窝重用作唯一的预测指标，就必须接受胎龄真实值存在相当大的不确定性：平均窝重为1千克时，发现95%的置信区间为±10.2天。一旦知道平均窝重，纳入器官重量数据并不能提供额外信息。
