Amenorrhea is the absence of menstrual cycle. This is divided into primary, when the woman does not have menstrual cycle to 16 years, or secondary, when the menstrual cycle is aborted in response to a regular phase. Women who have eating disorders or undergoing intensive training programs have increased risk of amenorrhea. Amenorrhea naturally during lactation, menopause and pregnancy but can also be caused by certain medications, hormonal disorders, weight problems and stress.
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