You will get your period after 3-7 days of progesterone injection. If you do not get your period, it may be related to the following factors: 1. The dose of progesterone is not enough, so it will not cause withdrawal bleeding. It is recommended to use enough dose and reach a certain number of days before menstruation will come after stopping the medication. 2. If progesterone is administered in case of pregnancy, menstruation will not come after stopping the medication. If you do not have a period by the time you get your period, it is best to have a urine HCG test before applying progesterone to induce menstruation. In addition, if you don’t have your period on the 8th day after progesterone, it is also recommended to do an early pregnancy test using morning urine again. 3. It is possible that the ovaries are in decline and you won’t have your period even if you take progesterone.