1. Serum testosterone levels decrease in middle age in women with the polycystic ovary syndrome 
Stephen J Winters, M.D., Evelyn Talbott, David S Guzick, Ph.D., M.D., Jeanne Zborowski, M.S., Kathleen P McHugh 
Fertility and Sterility 
Volume 73, Issue 4, Pages (April 2000)
DOI: /S (99)00641-X

2. Figure 1
Relation between age and levels of non–SHBG-bound testosterone or total testosterone in women with the polycystic ovary syndrome.
Winters. Testosterone levels in PCOS. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (99)00641-X)

3. Figure 2
Relation between age and non–SHBG-bound or total testosterone levels in control women.
Winters. Testosterone levels in PCOS. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (99)00641-X)

4. Figure 3
Influence of age by quartiles on mean total and non–SHBG-bound testosterone levels in women with the polycystic ovary syndrome and controls. Error bars represent 1 SD. ∗P<.05 for case-patients vs. controls, Student t-test.
Winters. Testosterone levels in PCOS. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (99)00641-X)