Barron, ML; Vanderkolk, K. Finding the Fertile Phase: Low-Cost Luteinizing Hormone Sticks Versus Electronic Fertility Monitor. MCN Am J Matern Child Nurs. 2018 May/Jun;43(3):153-157. doi: 10.1097/NMC.0000000000000422.
Conclusion
The WLH stick is sufficiently sensitive to use in place of the EFHM for determining peak fertility and with the Marquette Fertility algorithm.