Product function: 1. Ovulation pre-test paper can accurately detect the peak level of LH, so that women can predict the best pregnancy or contraception time, the accuracy rate is 99.9%. 2. Professional testing is as trustworthy as home self-testing. 3. It is practical and avoids the harm and stimulation of oral contraceptives on the human body. It is more suitable for sisters who are allergic to condoms.