Tanabe, K., Susumu, N., Hand, K., Nishii, K., & Ishikawa, I. (2001). Prediction of the potentially fertile period by urinary hormone measurements using a new home-use monitor. Human Reproduction 16(8):1619-1624
Key Results
There was agreement between the first day of peak fertility and the urinary LH peak day in 65.6% of cycles and detection 1 or 2 days before the urinary LH peak day in 24.1 and 6.9% of cycles respectively. In 58.6% of cycles the system detected up to 5 days of increased fertility prior to the urinary LH peak day. Warning days of the urinary LH peak were similarly determined using defined thresholds of E3G and oestradiol providing up to 5 days warning in 82.8 and 96.6% of cycles respectively.
Conclusion
“Here we present the results of a study designed to test whether CPFM can provide information about changes in cycle fertility which is comparable with that deduced from laboratory measurements. These results demonstrate that the CPFM will detect changes in urinary levels of LH and E3G which coincide well with laboratory measurements in the definition of the potentially fertile period. The system, which has been designed for home use, will allow couples to use the information to time intercourse for the best prospects of natural conception. In addition the system shows potential for use in the evaluation and treatment of the infertile couple.”