Weak positivity on ovulation test paper on the eighth day after ovulation is relatively normal, because the level of estrogen in the body after ovulation is gradually decreasing. The egg cell can also survive in the body for a certain period of time, so there will be a weak positive ovulation test paper. Ovulation test paper is mainly to monitor ovulation, is through the body of hormone levels to determine ovulation, generally strong positive two days before and after ovulation will occur, for women with fertility requirements is very important. However, ovulation test strips also have certain false positives and false negatives, which are related to the quality of the test strips and whether they are expired or not, and whether they are operated correctly. Sex before and after ovulation can increase the probability of conception, ovulation need to try to rest, avoid strenuous exercise and abdominal trauma, in order to prevent the rupture of the follicle, which may lead to intra-abdominal hemorrhage.