First Response 1-Step Ovulation Predictor Test is an easy way to help you find the 2 days when you are most able to become pregnant. It quickly and accurately detects the increase in luteinizing hormone in your urine (LH surge), which normally occurs 24-36 hours before ovulation. Your two most fertile days begin with the LH surge. You are most likely to become pregnant if you have intercourse within 24-36 hours after you detect your surge.

First Response 1-Step Ovulation Predictor Test includes 20 test sticks and the digital reader to track your levels daily. Once the ‘YES’ indicator appears, you know the time is right to try and become pregnant. It is easy to use and provides results in just 5 minutes.