Ott W J, Doyle S, Flamm S
Am J Perinatol. 1986 Jul;3(3):193-7. doi: 10.1055/s-2007-999866.
Four hundred sixty-four fetuses underwent real time ultrasound examination within 72 hours before birth to evaluate other factors than the weight formula itself that might influence the accuracy of ultrasound weight estimation. The results indicated that fetal sex had no effect on weight estimation accuracy, but that fetal growth patterns, cephalic index, and the amount of amniotic fluid did. The weights of small-for-gestational age infants were significantly overestimated. Infants with oligohydramnios and low cephalic indexes were significantly underestimated by the ultrasonic weight formula. The weights of infants with high cephalic indexes were slightly overestimated and infants that were large-for-gestational age were slightly underestimated.
464例胎儿在出生前72小时内接受了实时超声检查，以评估除体重公式本身之外可能影响超声体重估计准确性的其他因素。结果表明，胎儿性别对体重估计准确性没有影响，但胎儿生长模式、头指数和羊水量有影响。小于胎龄儿的体重被显著高估。羊水过少和头指数低的婴儿被超声体重公式显著低估。头指数高的婴儿体重被略微高估，大于胎龄儿被略微低估。
