Newell-Morris L, Orsini J, Seed J
Lab Anim Sci. 1980 Apr;30(2 Pt 1):180-7.
Crown-rump length, foot length and body weight were measured on 134 pigtailed macaque (Macaca nemestrina) fetuses and neonates between 50 and 176 days of gestation. Regression analysis was performed and linear equations generated that described the relation of age to each linear measurement. From the equations, best fit curves (sex-combined for the linear dimensions and sex-specific for weight) were drawn. The three variables were all highly correlated with gestational age, with the standard error of the estimate 1 week or less in each case. On the basis of accuracy of age prediction, reliability and simplicity of measurement, foot length was the best linear measurement for determining age, particularly after 100 gestational days.
对134只胎龄在50至176天之间的豚尾猕猴胎儿及新生儿测量了顶臀长、足长和体重。进行了回归分析并生成了线性方程，描述了年龄与每项线性测量指标之间的关系。根据这些方程绘制了最佳拟合曲线（线性维度为性别合并，体重为性别特异性）。这三个变量均与胎龄高度相关，每种情况下估计的标准误差均为1周或更小。基于年龄预测的准确性、测量的可靠性和简便性，足长是确定年龄的最佳线性测量指标，尤其是在妊娠100天后。
