Amenorrhea (uh-men-o-REE-uh) is the absence of menstruation — one or more missed menstrual periods. Women who have missed at least three menstrual periods in a row have amenorrhea, as do girls who haven't begun menstruation by age 15. The most common cause of amenorrhea is pregnancy.



3 Ganoderma
1 Guifei Bao
2 Danshen