Oligomenorrhoea

Oligomenorrhoea is infrequent or, in occasional usage, very light menstruationMore strictly, it is menstrual periods occurring at intervals of greater than 35 days, with only four to nine periods in a year. Menstrual periods should have been regularly established before the development of infrequent flow. The duration of such events may vary.
Infrequent Menstrual Periods

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