Wetzels L C, Hoogland H J, de Haan J
Gynecol Obstet Invest. 1982;13(4):235-40. doi: 10.1159/000299524.
In 47 cycles with hormonal evidence of ovulation, the detection and timing of ovulation by basal body temperature (BBT) and by ultrasonographical observation are compared. The ovulation detection rate by ultrasonographical method proves to be considerably higher than by BBT criteria. The timing of the day of ovulation is evaluated, assuming that the ultrasonographical event of follicle disappearance represents ovulation. BBT criteria nadir, coverline and the eye-balling method show a very poor frequency distribution. The result of the FDHP method is a nearly symmetrical distribution, however, with a considerable range. We conclude that ovulation detection and timing by BBT are not reliable.
在47个有排卵激素证据的周期中，比较了通过基础体温（BBT）和超声观察检测排卵及其时间。超声检查法的排卵检测率明显高于BBT标准。假设卵泡消失的超声事件代表排卵，对排卵日的时间进行评估。BBT标准的最低点、覆盖线和目测法显示频率分布很差。然而，FDHP法的结果是接近对称的分布，但范围相当大。我们得出结论，通过BBT检测排卵及其时间是不可靠的。
