Campbell D M, Smith A P, Wilson A W
Department of Obstetrics and Gynecology, University of Aberdeen, UK.
Acta Genet Med Gemellol (Roma). 1990;39(3):395-9. doi: 10.1017/s000156600000533x.
Ultrasonic assessment of fetal weight derived from multiple measurements of the fetus has become accepted in clinical practice as being useful in singleton pregnancies. Several different formulae for estimating fetal weight have been derived from differing measurements of the fetus, such as biparietal diameter, trunk circumference, and femur length. To date, there has been no attempt to evaluate such a technique in multiple pregnancy. This study aims to see whether the formulae derived for singleton pregnancy are applicable to twin pregnancies. Estimated fetal weight will be derived by mathematical modelling from ultrasonic measurements made within a week of delivery and the results compared with the actual birthweight to give an indication of how good such estimated fetal weights are. Factors to be considered in the analysis include whether there are differences between Twin I and Twin II, differences of presentation with twins and differences by gestation at delivery.
通过对胎儿进行多次测量来进行超声评估胎儿体重，在单胎妊娠的临床实践中已被认可为有用的方法。从对胎儿的不同测量值（如双顶径、躯干周长和股骨长度）中推导出了几种不同的估算胎儿体重的公式。迄今为止，尚未有人尝试在多胎妊娠中评估这种技术。本研究旨在观察为单胎妊娠推导的公式是否适用于双胎妊娠。将通过数学建模从分娩前一周内进行的超声测量中得出估计胎儿体重，并将结果与实际出生体重进行比较，以表明此类估计胎儿体重的准确性如何。分析中要考虑的因素包括双胞胎中第一个胎儿（Twin I）和第二个胎儿（Twin II）之间是否存在差异、双胞胎的胎位差异以及分娩时的孕周差异。
