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Means menstrual cycles farther apart than 36 days but shorter than 180 days. This may normally occur during early adolescence and in perimenopause. It is commonly a protective form of hypothalamic suppression in association with weight loss, inappropriately intense exercise training, emotional stress or under-nutrition. It appears to precede the development of anovulatory androgen excess. When oligomenorrhea is related to hypo-thalamic suppression, estrogen levels are low; but when related to anovulatory androgen excess, estrogen levels are high or normal.

Are benign tumors of fibrous and muscular tissue that grow in the muscle wall of the uterus. They increase in midlife women, and decrease after menopause. They are commonly without symptoms but often discovered because they are associated with heavy menstrual flow (menorrhagia).