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. Author manuscript; available in PMC: 2010 Oct 26.
Published in final edited form as: Ann N Y Acad Sci. 2010 Mar;1192:153–160. doi: 10.1111/j.1749-6632.2009.05349.x

Figure 4.

Figure 4

Premenopausal women (A) demonstrate normal cycling hormones and autocrine-paracine levels of activin/BMP, resulting in normal adult bone cell differentiation and bone turnover. (B) Peri-menopausal decreases in inhibin B (InhB) increase circulating FSH and local activin/BMP tone, increasing cell differentiation and turnover. (C) Postmenopausal decreases in InhA and estradiol amplify increases in cell differentiation and dramatically increase bone turnover. FSH, follicle-stimulating hormone.