Progesterone pills inserted into the vagina play the following roles: 1, supplemental progesterone, can have the effect of fetal safety. 2, can be in the case of luteal insufficiency of vaginal medication, can replenish the luteal function, so that the menstrual cycle to return to the normal state. 3, through the absorption of the mucous membranes of the vagina can have the effect of menstruation. In addition, during the vaginal plugging period: 1, must first wash the vulva, reduce the pathogenic bacteria into the vagina and cause infection. 2, pay attention to the night before going to bed before plugging the drug, direct plugging and then go to bed. 3, plugging the depth of the drug is about 10cm or so, in order to melt and absorbed.