What is "oligomenorrhea"

alt. infrequent or light menstrual periods in women of child-bearing age. n. infrequent or light menstrual periods in women of child-bearing age.

n. abnormally light or infrequent menstruation

Oligomenorrhea (or oligomenorrhoea) is infrequent (or, in occasional usage, very light) menstruation. More strictly, it is menstrual periods occurring at intervals of greater than 35 days, with only four to nine periods in a year. Also, menstrual periods should have been regularly established previously before the development of infrequent flow. The duration of such events may vary.