1. Low serum osteoprotegerin levels in premenopausal infertile women with low bone density: an association of relevance? 
John M. Norian, MD., Gohar Zeitlian, M.D., Goli Adel, B.S., Ruth G. Freeman, M.D., Nanette F. Santoro, M.D., Lubna Pal, M.B.B.S., MRCOG, M.S. 
Fertility and Sterility 
Volume 91, Issue 2, Pages (February 2009)
DOI: /j.fertnstert
Copyright © 2009 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Premenopausal infertile women show an inverse correlation between serum osteoprotegerin (OPG) and receptor activator of NF-κB ligand (RANk-L) levels.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2009 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Prevalence of low bone mineral density (BMD) in infertile women is shown across tertiles for osteoprotegerin (OPG) levels. A statistically significantly higher prevalence of low BMD is noted in women with serum OPG levels in the lowest OPG tertile (compared with the middle to highest tertiles).
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2009 American Society for Reproductive Medicine Terms and Conditions