Menstruation is a biological marker of health and wellness. In industrialized regions of the world, the average age of menarche is about 12 years, 1 and across the life span, people who menstruate can expect to have up to 400 menstrual cycles, or periods. Not all people who identify as women menstruate, and not all menstruating people identify as women. People who menstruate include cisgender women and girls, transgender people, and nonbinary people. A typical menstrual cycle is about 21 to 34 days, with menstrual bleeding lasting up to 7 days. 1 Menstruation can be accompanied by a myriad of benign symptoms, such as irritability, breast pain, abdominal bloating, fatigue, or general cramping as the uterus contracts to expel endometrial lining. 2 However, upward of 1 in 4 people who menstruate experience irregular menstrual cycles, abnormal menstrual bleeding, and/or other menstrual health problems such as severe pain. 3 Globally, menstrual health and hygiene is a forefront topic; it is one of the 5 interlinked priorities for empowering adolescent girls of the United Nations International Children's Emergency Fund 4 and is central to achieving several of the United Nations Sustainable Development Goals. 5 In the United States, the American College of Nurse-Midwives states that a hallmark of midwifery is characterized by "recognition, promotion, and advocacy of menarche … as normal physiologic and developmental processes," 6 promoting menstruation and menstrual care as basic principles of health. In addition, the American College of Obstetricians and Gynecologists and the American Academy of Pediatrics both acknowledge the importance of understanding and discussing normal and abnormal menstruation patterns with patients, and both organizations suggest charting patient menstrual