Clinical Guard ovulation test strips are an accurate, affordable and consistently reliable test for women who wish to track their most fertile days without breaking the bank. Each test is individually sealed to ensure for quality, and are designed to detect trace amounts of luteinizing hormone or LH that are normally secreted in trace amounts throughout a woman's menstrual cycle. After a positive result is given, ovulation will typically occur after 24 to 48 hours. A positive result will display a fully saturated colored test band beneath the control line and a negative result will not display a color under the control band.