The weak positive test paper after ovulation may be caused by factors such as low endocrine function and inflammation. 1. Low endocrine function: ovulation test paper detects the level of estrogen, progesterone and other hormones in the female body, if a woman’s endocrine function is poor, it may lead to a decline in hormone levels, resulting in the test paper showing a weak positive situation. 2. Inflammation: If a woman suffers from acute pelvic inflammatory disease, acute salpingitis, acute endometritis and other inflammatory diseases, it may affect the female endocrine function, so that the female hormone level decreases, which leads to the test paper shows a weak positive. If there is a need for fertility, you can have intercourse when the ovulation test paper appears strong positive to weak positive, which is conducive to conception. But note that the use of ovulation test paper has a certain error, ovulation test paper is affected by a variety of factors, if you drink too much water will cause urine dilution, easy to cause a weak positive, ovulation test paper quality is not good will also affect the results of the test, it is best to choose the regular manufacturers of ovulation test paper. After ovulation test paper has been weak positive, we should go to the hospital in time to confirm the diagnosis, clear cause, standardized treatment under the guidance of the doctor.