What are some reasons a menstrual cycle might change?

A menstrual cycle might change for a variety of reasons, including fluctuations in hormone levels, changes in diet or exercise habits, stress, and various health conditions.

Changes in hormone levels are the most common cause of menstrual cycle changes. For example, pregnancy can cause a woman's period to stop happening altogether, while menopause is characterized by a general decrease in the production of hormones like estrogen and progesterone.

Other causes of menstrual cycle changes include changes in diet or exercise habits, stress, and various health conditions. For example, chronic stress can lead to an increase in the number of times a woman experiences irregular periods, while uterine fibroids can cause heavier and more painful periods.