If ovulation test strips are applied to detect the presence of ovulation, it is best to check at the following times: First, if the menstrual cycle is 28-30 days, it is recommended to give monitoring from the 11th-12th day of menstruation. Secondly, the urine is not the morning urine, but the urine around 10 o’clock in the morning, because the ovulation test paper detects the luteinizing hormone in the urine, and the value of luteinizing hormone will reach its relative peak around 10 o’clock in the morning, so the positive rate of the test will be higher at this time. When the ovulation test is strongly positive, ovulation will occur about 24-48 hours after this test, so you can schedule intercourse according to this to increase the chance of pregnancy.