The Ovulation Predictor test works by detecting increased amounts of LH (luteinizing hormone) in your urine. A surge in the LH hormone indicates when you are most likely to ovulate. Having intercourse within 24-48 hours after you detect your surge, increases your likelihood of becoming pregnant.Features Results in 3 minutes. Over 99% accurate. Easy to use. Clear results. Case of 6. Item Weight - 5 oz. - SKU: MVTR648