There are many ways to get a period, for example, for women with thickened endometrium and delayed menstruation who have ruled out pregnancy, they can take progesterone capsules orally to form withdrawal bleeding. However, when progesterone capsules are taken orally, it takes one to two weeks after stopping the medication for the endometrium to peel off and for the menstruation to come. It is impossible to get a menstrual flow on the same day. The only way to get a menstrual flow is through the withdrawal of estrogen and progesterone, and only after the endometrium peels off can a normal menstrual flow be formed, and there is no way to make estrogen and progesterone withdraw at the same time, unless it is a normal menstrual flow, or after ovulation, the hormone level is temporarily low and there is withdrawal bleeding. There is also a case of vaginal bleeding due to insufficient luteal function after pregnancy.