本文对202例胎儿测量的数据进行了多元线性回归分析和逐步回归分析,包括胎儿身长(x_1),顶臀长(x_2)、枕额径(x_3)、双顶径(x_4)、头围(x_5)、胸围(x_6)、腹围(x_7)和体重(x_8)等八个自变量与应变量胎龄(y)的关系,即:y=b_0十b_1x_1+b_2x_2+b_3x_3+b_4x_4+b_5x_5+b_6x_6+b_7x_7+b_8x_8的多元回归方程。结果各项指标均与胎龄有明显的相关性,其中x_1、x_3、x_5、x_6、x_7、x_8与胎龄的相关性最大。 In this paper, multiple linear regression analysis and stepwise regression analysis were performed on the data of 202 fetuses measured, including fetal height (x_1), top hip length (x_2), occipitofrontal diameter (x_3), biparietal diameter (x_4) x_5), chest circumference (x_6), abdominal circumference (x_7), and body weight (x_8), respectively, were calculated as follows: y = b_0 ten b_1x_1 + b_2x_2 + b_3x_3 + b_4x_4 + b_5x_5 + Multiple regression equations for b_6x_6 + b_7x_7 + b_8x_8. Results All the indexes had significant correlation with gestational age, of which x_1, x_3, x_5, x_6, x_7 and x_8 had the highest correlation with gestational age.