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Polymenorrhea: frequent periods (with intervals of 21 days or less).
Oligomenorrhea: infrequent or short menstrual periods. Frequency exceeds 35 days in between menstruation, and less than 3 days during it.
Amenorrhea: absence of periods for more than 60 days in a woman of reproductive age. Usually occurs during pregnancy and breastfeeding.
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Dysmenorrhea, cramps or painful menstruation, involves menstrual periods that are accompanied by either sharp, intermittent pain or dull, aching pain, usually in the pelvis or lower abdomen.
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Hypomenorrhea: A diminution of the flow or a shortening of the duration of menstruation.
Menorrhagia is an abnormally heavy and prolonged menstrual period. It may be associated with abnormally painful periods (dysmenorrhoea).
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