Ovulation Predictor Kits (OPKs) are Home-testing devices that help individuals identify the most Fertile days of their Menstrual Cycle by detecting the surge in Luteinizing Hormone (LH) that precedes ovulation. Accurate Timing of intercourse or insemination around this LH surge can significantly increase the Likelihood of conception, making OPKs a Valuable Tool for those Trying to conceive.