Irregular menstrual cycles refer to variations in the timing, length, or flow of a woman's menstrual period. A typical cycle lasts between 21 to 35 days, but irregular cycles can be shorter or longer, or periods may be missed altogether. Factors such as stress, hormonal imbalances, and certain medical conditions can contribute to these irregularities. Women experiencing irregular cycles may notice changes in symptoms, such as heavier or lighter bleeding. Conditions like polycystic ovary syndrome (PCOS) or thyroid disorders can also lead to irregularities. Tracking menstrual patterns can help identify any significant changes and guide discussions with healthcare providers.