The process of taking progesterone for menstruation does not lead to ovulation. The reason for taking progesterone to induce menstruation is that ovulation does not occur during this menstrual cycle and no progesterone is secreted to act on the endometrium, causing the endometrium to change from the proliferative phase to the secretory phase, resulting in the onset of menstruation. In this menstrual cycle, the endometrium undergoes hyperplasia and endometrial thickening under the action of estrogen alone. In order to adjust the menstrual cycle, progesterone is taken orally to induce menstruation, so there is no ovulation in this menstruation, while it is uncertain whether the next menstruation can be ovulated and the function of the gonadal axis. If you have polycystic ovary syndrome, which is characterized by delayed menstruation, vaginal bleeding can occur in most cases with progesterone, but it does not improve the problem of sporadic ovulation or even non-ovulation. Progesterone, or progesterone, is an important sex hormone secreted by the ovaries, which has the effect of regulating menstruation and settling the fetus.