label: Perimenopausal
label_lc: perimenopausal
description: "Perimenopause, or the menopausal transition, encompasses that period of time during which physiologic changes mark progression toward a woman's final menstrual period. This phase begins with the onset of menstrual irregularities and continues until a woman reaches menopause, or one year after amenorrhea has occurred. Perimenopause can last for a variable amount of time, the median of which is four years."