The absence of menstruation after weaning may be due to the fact that the ovarian function has not fully recovered and is in a state of inhibition, and the endometrium is thin, so menstruation still does not come after weaning. In this case, if there is no special discomfort, you can wait for a period of time naturally, or your period may come naturally. If you do not want to wait, you can go to the hospital for an ultrasound examination to find out the thickness of the endometrium. If the endometrium is thick, progesterone can be given orally, 100mg, once a day for 5 days. Normally withdrawal bleeding, also known as menstrual flow, will occur 3-7 days after stopping the medication, and if this occurs it usually does not require special treatment. If menstruation occurs after taking progesterone and the cycle returns to normal after the next menstruation, natural observation is sufficient.