The term “great aunt” refers to menstruation. Last month’s period was 15 days, this month does not come, is generally a sign of irregular menstruation, but does not rule out the possibility of pregnancy. Last month’s period of 15 days, this month does not come, usually is a sign of irregular menstruation, work and life stress, irregular work and rest, and so on are likely to lead to irregular menstruation. However, it is not excluded that the patient is pregnant, because even if the menstrual irregularity, as long as there is ovulation, the patient may get pregnant, at this time, in order to be on the safe side, it is recommended that the patient to detect whether she is pregnant. If the coitus time is short and can’t detect pregnancy, patients are advised to wait patiently for a few days, in the waiting days, pay attention to replenish sufficient nutrition, pay attention to rest, keep emotionally calm, closely observe their own physical condition, and consult a doctor in time to avoid accidents.