If you use progesterone to induce menstruation, in the clinical oral 3 days in a row, after stopping the drug 3-7 days will come to menstruation, but pay attention to: 1, if the progesterone allergy, you can not use progesterone to induce menstruation. 2, in the period of time you can not miss the dose, must pay attention to take at a fixed time every day. 3, because the progesterone gel pills in the clinical can cause dizziness, so in order to avoid dizziness phenomenon, must be in the sleeping Before oral intake. If the eighth day after stopping the drug is still not menstruation, must go to the hospital to give a check to rule out the possibility of pregnancy, you can do urine HCG laboratory test. If the possibility of pregnancy is ruled out, the possibility of premature ovarian failure should be ruled out, and it is recommended that blood tests for sex hormone six be taken.