Monitoring ovulation is more accurate from 10:00 am to 8:00 pm throughout the day. When close to a woman’s ovulation day, it is recommended to test twice a day, and when the test is weakly positive, it is recommended to test once at 4-hour intervals. For women with regular menstruation, ovulation occurs about 14 days before the next period, and luteinizing hormone in the urine reaches its peak value 24-48 hours before ovulation. By testing luteinizing hormone in the urine, the time of ovulation can be estimated. Detecting the time of ovulation and having sex is beneficial for pregnancy. Near the estimated time of ovulation, ovulation tests can be done once a day at around 10:00 am, and once a day at around 8:00 pm, or other suitable times depending on the patient’s work life habits. During the ovulation monitoring period, the patient should drink an appropriate amount of water to ensure a steady amount of urine every day to keep the concentration of luteinizing hormone in the urine as stable as possible.