Geometric mean levels of FSH (in mIU/mL) by reproductive stage of women:
reproductive 7.0, menopause transition 21.9, postmenopausal 45.7 (NHANES 1999-2000)
Source: Henrich JB, Hughes JP, Kaufman SC, Brody DJ, Curtin LR. Limitations of follicle-stimulating hormone in assessing menopause status: findings from the National Health and Nutrition Examination Survey (NHANES 1999-2000). Menopause 2006 Mar.-Apr;13(2):171-7