If your period is not on time every month, it means that there is a problem with ovulation, because women’s menstruation depends on regular ovulation, which occurs at a fixed time every month, 14 days after ovulation, on the first day of your next period. If the follicles take a long time to develop throughout the cycle and are expelled late, menstruation will be delayed. If the follicles develop and ovulate earlier or shrink earlier, the menstrual cycle will be earlier. Therefore, irregular menstruation, whether pushed back or early, indicates a problem with ovarian ovulation. In this case, a blood test for female hormone 6 must be done on the third day of menstruation to assess the type of ovarian ovulation disorder. Depending on the different hormone levels, the patient’s age, and whether she has fertility requirements, an individualized treatment plan will then be developed to regulate menstruation or promote ovulation for pregnancy.