Harrison R F, Roberts A P, Campbell S
Br J Obstet Gynaecol. 1977 Feb;84(2):98-107. doi: 10.1111/j.1471-0528.1977.tb12534.x.
The reliability of eight methods for estimating gestational age in the third trimester of pregnancy has been assessed in patients with fetuses of known maturity. Late ultrasound cephalometry, amniotic fluid creatinine estimations and lecithin/sphingomyelin ratio were found to be significantly more reliable than the other five methods. The mean of estimated gestational ages provided by the three techniques used in combination gave a significantly more accurate prediction of fetal age than any single test and allowed formation of a 'maturity profile'.
对已知胎儿成熟度的患者评估了妊娠晚期估计胎龄的八种方法的可靠性。发现晚期超声头测量法、羊水肌酐测定法和卵磷脂/鞘磷脂比值比其他五种方法明显更可靠。联合使用的三种技术所提供的估计胎龄平均值对胎儿年龄的预测比任何单一测试都明显更准确，并有助于形成一个“成熟度概况”。
