Women\’s Menstrual Cycle Women\’s menstrual cycle refers to the menstrual cycle, which is usually about 28 days, but in fact, some women\’s menstrual cycles vary in length and may even exceed 35 days. The menstrual cycle can be divided into the ovarian phase, endometrial proliferation phase, ovulation phase and endometrial shedding phase. During the ovarian phase, the ovary begins to gradually develop follicles, one of which will gradually grow longer.