Complete absence of menstruation in a young woman who is at least 16 years old. Causes Usually unknown. Most girls begin menstruating by age 14, average age is 12 years and 8 months.
Treatment usually involves hormone replacement therapy.
Treatment for amenorrhea not related to hormone deficiency depends on the cause. Psychotherapy or counselling, if amenorrhea is stress-related or results from eating disorders. If bleeding begins when progesterone is withdrawn, the reproductive system is functioning. This also indicates that pituitary disease is unlikely. If progesterone withdrawal does not induce bleeding, gonad stimulants such as clomiphene or gonadotropins may be used for the same purpose.