noun
menstrual irregularity; irregular menstruation
Medical term for irregular menstrual cycles. Used in clinical or formal contexts.
月経不順の原因を調べるために、婦人科を受診した。
I visited a gynecologist to investigate the cause of my menstrual irregularity.
More common, everyday term for irregular periods. 月経不順 is more formal and clinical.
Compound of 月経 (menstruation) and 不順 (irregularity, disorder).