Oligomenorrhea is a term for infrequent menstruation, i.e. for cases where the number of annual menstrual cycles is smaller than the usual 11 to 13, and if they occur, they are short and scarce. Other menstrual periods are normal, as well as ovulation.
Oligomenorrhoea is most commonly seen as a natural process in women who are closer to menopause, though this condition occurs in some women throughout life due to the particularity of the hormonal cycle. Oligomenorrhea is rarely a sign of some more serious discomfort.
What to do?
Oligomenorrhea is not dangerous and requires treatment only in women who want to stay pregnant (see infertility).