For women with delayed ovulation, menstruation is usually delayed. After ovulation, the corpus luteum will be formed, which can produce estrogen and progesterone. Generally, when the corpus luteum atrophies, the estrogen and progesterone level will decrease, which will lead to endometrial stripping and menstruation, and the corpus luteum will start to atrophy in 9-10 days after its formation, and ovulation usually occurs 14 days before the next menstrual period, so delayed ovulation will lead to delayed menstruation. For women who need to prepare for pregnancy and have irregular periods, they can monitor the growth and development of the follicles and the time of their discharge by taking their temperature in the morning, measuring the level of sex hormones, or by ultrasound, so as to increase the chances of getting pregnant. For women with irregular menstruation, it is recommended that they go to a regular hospital for a complete ultrasound, sex hormone and other relevant examinations to clarify the cause of the disease and then actively treat it under the guidance of the doctor.