Borth R, Benoit H J, Woolever C A
Contraception. 1980 Jan;21(1):41-6. doi: 10.1016/0010-7824(80)90137-7.
Through seven of eight consecutive cycles, a volunteer used an opto-electronic vaginal probe to record at home her daily values of vaginal back-scattering (VBS) of infrared light, at the same time as taking her daily oral temperature (BBT). Under the basal conditions used, VBS reflects vaginal changes influenced by estrogenic hormones. Each of the seven VBS curves showed a characteristic rise and fall during the first part of the cycle, preceding both inguinal pain and the BBT midcycle minimum. Periods of likely high fertility could be defined by two criteria which were applicable to all cycles recorded in this subject, and recognizable at the time of observation.
在连续八个周期中的七个周期里，一名志愿者在家中使用光电阴道探头记录她每天的阴道红外光反向散射（VBS）值，同时测量她每天的基础体温（BBT）。在所采用的基础条件下，VBS反映受雌激素影响的阴道变化。七条VBS曲线中的每一条在周期的第一部分都呈现出特征性的上升和下降，早于腹股沟疼痛和基础体温周期中期的最低点。可以通过两个适用于该受试者记录的所有周期且在观察时可识别的标准来定义可能的高生育期。
