What does menstruation accomplish?

Menstruation is a key component of the female reproductive cycle, primarily serving to prepare the body for potential pregnancy. Each month, the uterine lining thickens to support a fertilized egg; if fertilization does not occur, this lining is shed, resulting in menstruation. This process also helps regulate hormonal levels and can be indicative of overall reproductive health. Additionally, menstruation plays a role in the cyclic nature of fertility in individuals with a uterus.