What is the worlds longest menstrual cycle?

There is no definite answer to what is the longest menstrual cycle, as it can vary greatly from woman to woman. However, a menstrual cycle that lasts longer than 35 days is considered long. Long menstrual cycles can be caused by various factors, such as hormonal imbalances, thyroid problems, or certain medications. If you are experiencing long menstrual cycles, it is recommended to consult a doctor to rule out any underlying medical conditions.