There is no best time to check ovulation, usually women with regular periods can check ovulation during the ovulation period, women need to use ultrasound and ovulation test paper to check the time of ovulation. For women with regular periods who are preparing for pregnancy can choose to test for ovulation during the ovulation period, which is the first 5 days and the last 4 days of the 14 days before the next menstrual period. Women can detect the time of ovulation through ultrasound testing, which is helpful to know the size of the dominant follicle and observe the growth of the dominant follicle to determine the time of its ovulation. In addition, women can also use ovulation test paper to detect the time of ovulation, if the ovulation test paper test found that the ovulation test paper appeared positive, indicating that the body luteinizing hormone content is high. If the ovulation test paper appears strong positive, it means that ovulation is about to occur. For women who want to get pregnant, you can choose to have intercourse two days before or after ovulation is about to occur, which can increase the chances of pregnancy. For women with irregular periods, they need to monitor the time of ovulation under the guidance of their doctors to improve their chances of getting pregnant.