It is possible for the ovulation test paper to be dark and light before you get your period. Ovulation is usually about 14 days before menstruation, and the ovulation test paper is weakly positive, indicating that ovulation has long been completed in the days before menstruation. After a woman ovulates normally, the value of luteinizing hormone will gradually decline, and the level of progesterone will gradually rise, and at this time, the results of the ovulation test paper test may gradually change from positive to weakly positive. Therefore, the ovulation test paper is deep and light on behalf of the ovulation period has ended, the body’s hormone levels gradually return to normal, is a normal phenomenon do not have to worry too much. It should be noted that the test paper moisture, improper operation and other factors can also lead to errors in the results, the phenomenon of inaccurate results of ovulation test paper, you can replace the test paper to test again to ensure the accuracy of the results.