Ovulation and menstruation are related. When ovulation is normal, menstruation is normal, with menstruation occurring 12-14 days after ovulation. If there is an obstacle to ovulation or if ovulation is irregular, you will show irregular menstruation, with dripping periods, menopause, delayed periods, or even amenorrhea. Generally regular menstruation and normal ovulation are mostly normal, except when breastfeeding, when the ovaries continue to ovulate even without menstruation. If a person with irregular menstruation has fertility requirements, she can be treated directly with ovulation promotion without regulating her menstruation, and her menstruation will be naturally regular after ovulation is regular. In adolescents and perimenopausal patients, menstrual abnormalities are usually of the anovulatory type and are mainly related to menstrual disorders caused by the absence of normal ovulation in the ovaries during the menstrual cycle.