Begin testing on day five of your period for best results. The First Response Ovulation Test isn"t a method of birth control, but it can help determine the most likely time you"ll get pregnant. These ovulation tests are 99-percent accurate to help you and your partner start a family. First Response Digital Ovulation Test: * Unmistakable yes/no readouts * Tracks your personal LH level daily * With EasyRead technology * Contains 1 digital reader and 20 test sticks for a month of testing