After ovulation, it is normal for menstruation to occur about 14 days after ovulation, which may fluctuate slightly depending on each individual’s situation. For women who have regular periods, ovulation usually occurs in the middle of menstruation, and the normal menstrual cycle is usually 28-30 days, so it is normal to have menstruation 14 days after ovulation, but due to the differences in each person’s menstrual cycle, it can fluctuate slightly on this basis. After ovulation, the follicle transforms into the corpus luteum, which secretes progesterone to stimulate the endometrium to transform into the secretory phase, and when the progesterone withdraws, the endometrium sheds and thus produces menstruation. If irregular menstruation occurs, it is recommended to go to the hospital in time and take the appropriate method of treatment under the guidance of the doctor to promote the alleviation of the condition.