目的：用超声和临床方法，四个公式估计胎儿体重，以比较其准确性。
Objective To determine the accuracy of various methods for estimating fetal weight at labor .
评价胎儿包括胎儿体重和位置。对胎儿大小的估计，即使是超声学获得的结果经常都不准确。
Assessment of the fetus consists of estimating fetal weight and position. Estimations of fetal size, even those obtained by ultrasonography, are frequently inaccurate.
评价胎儿包括胎儿体重和位置。对胎儿大小的估计，即使是超声学获得的结果经常都不准确。
Assessment of the fetus consists of estimating fetal weight and position. Estimations of fetal size, even those obtained by ultrasonography, are frequently inaccurate.
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