Menstruation delayed by a week

Menstruation delay a week, first of all to rule out whether there is pregnancy. We need to do a blood test human chorionic gonadotropin, if negative, consider amenorrhea. Amenorrhea needs to do a B-ultrasound to see the thickness of the endometrium, but also ask the patient whether there are recent changes in living habits, or major events may cause menstrual disorders. Can do progesterone withdrawal experiment, see what is the cause of amenorrhea? According to the cause to treat. Usually pay attention to the same room hygiene, stay up late, keep shorts dry, wear cotton underwear, strengthen exercise, prevent strenuous exercise. Diet balance, rich nutrition, cleaning external genitals before and after the same room, regular gynecological examination, especially cervical cancer screening.