What is the definition of oligomenorrhea?

Oligomenorrhea is characterized by infrequent menstrual periods, typically defined as having cycles that occur more than 35 days apart. This condition reflects an irregularity in menstruation rather than an absence of periods. It often indicates a hormonal imbalance that may stem from various underlying issues such as polycystic ovary syndrome (PCOS), stress, significant weight changes, or other health factors. Recognizing oligomenorrhea is vital in clinical practice as it can be a precursor to more significant reproductive health concerns and may require further evaluation and management.