Auntie usually refers to menstruation. If the patient is taking emergency contraceptive pills, then eight days without menstruation is not normal; if the oral short-acting contraceptive pills, during the period of taking the pills will not come to menstruation, so eight days without menstruation is normal. Emergency contraceptive pills are synthetic progestin preparations, after taking the pill will stop or delay the release of egg cells, and thus play a contraceptive effect, generally within one week of taking the pill will appear menstrual vaginal bleeding phenomenon, for the pill eight days after the menstrual period is still not coming tide of the patient, to be vigilant about the occurrence of pregnancy. Short-acting contraceptives are highly effective estrogen-progestin preparations, during the drug will inhibit the function of the female gonadal axis, follicle growth and development stops, so during the drug will not come to menstruation, usually within 7 days of stopping the drug menstrual-like withdrawal bleeding phenomenon. For patients who have taken the pill for eight days without menstruation, it is recommended that they go to the gynecology department of a regular hospital, complete the blood HCG, ultrasound and other relevant examinations, to clarify the cause of the disease under the guidance of the doctor to actively treat.