The release of an abnormally small quantity of blood at menstruation. The duration of bleeding may be normal or less than normal.
A deficient amount of menstrual flow, but with regular periods.
A condition where the menstrual cycle is extended and frequently irregular because of ovarian dysfunction. There’s minimal blood loss, and the time between periods can span several months. In young females, it might be a result of underdeveloped sexual organs. In adults, it can arise from diseases that suppress ovarian activity.