What is the definition of amenorrhea?

Amenorrhea is defined as the absence of menstruation. This medical term is used to describe a condition in which a woman does not have her menstrual period for a duration of time that is longer than what is considered normal for her. Amenorrhea can be classified into two primary types: primary amenorrhea, which occurs when menstruation has not begun by age 15 or within three years of breast development, and secondary amenorrhea, which is defined as the cessation of menstruation in a woman who has previously had regular periods for three months or longer. The absence of menstruation can result from various factors, including hormonal imbalances, pregnancy, excessive exercise, stress, or underlying medical conditions. Understanding this definition is crucial for diagnosing and managing women's reproductive health issues.