A positive ovulation test paper means that there is a certain concentration of luteinizing hormone in the body, but it has not reached its peak state. A strong positive indicates that the luteinizing hormone in the body has reached its peak, meaning that ovulation occurs about 24-48 hours after reaching its peak, and is detected using ovulation test strips. Choosing to have sex within 24-48 hours after a strong positive test increases the chances of getting pregnant, which is the significance of the ovulation test in the clinical setting and the difference between a positive ovulation test and a strong positive test. It is recommended to start testing with ovulation test strips on the 12th day of menstruation, and it is best not to drink too much water before retaining the urine, so as not to cause dilution of the urine and different results.