What term refers to abnormally light or infrequent menstruation?

Oligomenorrhea refers specifically to abnormally light or infrequent menstruation. This condition is characterized by an irregular menstrual cycle where periods may occur only a few times a year, typically defined as cycles occurring more than 35 days apart. It suggests that the individual is not experiencing the expected menstrual flow or frequency, which can be due to various factors including hormonal imbalances or other health issues.

In contrast, the other terms relate to different menstrual conditions: menorrhagia refers to heavy or prolonged menstrual bleeding, dysmenorrhea indicates painful periods, and polymenorrhea signifies a shorter menstrual cycle where periods occur more frequently than normal. Understanding these distinctions is crucial for correctly identifying and discussing menstrual disorders.