Amenorrhea, Amenia
The absence or abnormal stoppage of menstruation. It can be primary or secondary. In some cases amenorrhea is a natural part of life, as in the case of menopause. In other instances it can indicate a health problem possibly with different organs and/or hormones. When a young girl who is active in sports and has low body fat percentage does not begin or continue her menstrual cycle, this can be a normal occurrence, however, a health care practitioner should be consulted just to make sure.