RT Book, Section A1 Nathan, Lauren A2 DeCherney, Alan H. A2 Nathan, Lauren A2 Laufer, Neri A2 Roman, Ashley S. SR Print(0) ID 56977100 T1 Chapter 59. Menopause & Postmenopause T2 CURRENT Diagnosis & Treatment: Obstetrics & Gynecology, 11e YR 2013 FD 2013 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-163856-2 LK obgyn.mhmedical.com/content.aspx?aid=56977100 RD 2024/03/28 AB Natural menopause diagnosed after 12 months of amenorrhea with no obvious pathologic causeAverage age 51 yearsEstradiol <20 pg/mL and follicle-stimulation hormone level 21–100 mU/mL helpful in establishing the diagnosisInduced menopause is defined as permanent cessation of menstruation after bilateral oophorectomy or ablation of ovarian function (ie, by chemotherapy or radiation)Premature menopause defined as menopause reached at or before age 40 and can be natural or inducedPerimenopause/menopause transition defined by menstrual cycle and hormonal changes that occur a few years before and 12 months after the final menstrual period resulting from natural menopauseMay be associated with vasomotor symptoms, sleep disturbance, and vaginal/urinary symptoms