Generally progesterone to regulate menstruation from the 15th day or so, need to be taken on time under the guidance of a doctor. Progesterone capsule is a progestin preparation, suitable for women with a certain level of estrogen in the body to regulate menstruation. It should be taken under doctor’s supervision from about the 15th day of the menstrual cycle, and needs to be taken continuously for 10~14 days, which can make the endometrium in proliferative phase transform into the endometrium in secretory phase, and cause uterine bleeding due to shedding of endometrium after stopping the drug, and can be applied for 3~6 months as appropriate. Contraindications such as drug allergy and unexplained vaginal bleeding should be ruled out before taking progesterone, and adverse reactions such as dizziness, nausea, headache, and vaginal spotting bleeding may occur after taking the drug. Caution should be exercised by those with underlying diseases such as renal disease and hypertension. When sudden partial loss of vision or blindness, diplopia and other abnormalities occur after taking the drug, the drug should be stopped immediately and go to the hospital promptly.