What is the definition of oligomenorrhea?

Oligomenorrhea is defined as infrequent menstrual periods that occur more than 35 days apart. This condition is characterized by menstrual cycles that are less frequent than the normal range, which typically spans from 21 to 35 days. When a person experiences cycles longer than this, it indicates a disruption in the regular hormonal patterns that regulate menstruation.

Understanding oligomenorrhea is important, as it can be associated with various underlying health issues, including hormonal imbalances, polycystic ovary syndrome (PCOS), and other factors affecting reproductive health. The key distinction lies in the frequency of the cycles—rather than simply being irregular or absent, oligomenorrhea specifically refers to the occurrence of menstruation at intervals that exceed the typical timeframe. This understanding is crucial for proper diagnosis and management in women's health contexts.