Ovulation monitoring test results that change from strong positive to weak positive usually indicate that ovulation is complete and intercourse at this time can increase the chance of pregnancy. Luteinizing hormone is an important hormone that promotes ovulation. 1-2 days before ovulation, luteinizing hormone will reach its peak value and the level of luteinizing hormone in the urine will also increase, which makes the ovulation monitoring test strongly positive. After ovulation, the hormone level starts to drop and the luteinizing hormone level in the urine will also become low, at this time, the test result will change from strong positive to weak positive, which generally indicates that ovulation has been completed. When an ovulation test is positive, it is usually recommended to test every 4 hours to determine when a strong positive turns into a weak positive. Since sperm can survive in a woman’s body for about 72 hours, if there is a need to get pregnant, intercourse can be arranged at the time of a strong positive test. Women who need birth control should also be careful to avoid intercourse during this time. Hormone levels in the urine are susceptible to certain factors, such as drinking a lot of water before ovulation, which may cause the concentration of luteinizing hormone in the urine to become low, and the ovulation monitoring test may change from a strong positive to a weak positive at this time. If you take medication containing luteinizing hormone, the medication is broken down in your body and eventually enters your urine, which will also increase the level of the hormone in your urine, and a strong positive to weak positive ovulation test may occur after this. Therefore, the results of the test strips are not very accurate. In order to know if you are ovulating, it is recommended to go to the hospital for ultrasound to monitor ovulation, which can determine more accurately whether you are ovulating.