Menopause Transition, Sex Hormone Deficiency and Autonomic and Vascular Function

This study is being done to learn more about the influence of the menopausal transition on autonomic and vascular function in midlife females. Participants will have their vitals taken and height, weight and waist-to-hip ratio measurements done, complete questionnaires, have blood draws, have electrical activity of a nerve in the leg measured (optional), have blood vessel function measured in the arm, perform breathing exercises, and complete a cold pressor test (putting a hand in ice-cold water). Participants will also have a scan to measure body composition and bone density.