It is generally advocated to let menstruation come naturally and artificial intervention in the menstrual cycle is not recommended. However, if examined by a doctor and there is a need to let menstruation come earlier, oral estrogen and progestin combination therapy or progestin alone can be used to let menstruation come earlier, as these are hormone drugs, which are generally not advocated to be used frequently and repeatedly, or else they will have adverse effects on the body. The basic principle of menstruation is that the endometrium undergoes changes in the proliferative and secretory phases, and the luteal function atrophies after ovulation, resulting in a drop in hormone levels and the production of withdrawal bleeding. If you want your period to come earlier, you can choose to use a combination of estrogen and progestin to promote menstruation, or you can use progestin alone to regulate the timing of menstruation so that the uterine lining thickens and sheds earlier. It should be noted that these drugs are hormone drugs, if often used repeatedly, it is easy to cause menstrual disorders, endocrine disorders and other adverse reactions, so it is recommended that women without special reasons, should try to let menstruation naturally, and recommended that patients to change the menstrual cycle, it is best to choose the best drugs under the guidance of a professional doctor according to the specific conditions, and also need to pay attention to the specific timing of the use of drugs.