Baeyertz J D
N Z Med J. 1983 Dec 28;96(746):1059-60.
From a series of women with known conception dates, the 50th percentiles of their weekly fundal height measurements were used to calibrate a measuring tape. As a method of gestational assessment, the tape was found to be accurate to within two weeks of the exact dates in 79% of this control group, compared with 96% and 84% respectively using conventional crown rump length and biparietal diameter ultrasound techniques on these same patients.
从一系列已知受孕日期的女性中，取她们每周宫高测量值的第50百分位数来校准卷尺。作为一种妊娠评估方法，在这个对照组中，发现该卷尺在79%的情况下，测量结果与确切日期的误差在两周以内，而对这些相同的患者使用传统的超声测量头臀长度和双顶径技术时，这一比例分别为96%和84%。
