1. Variability of serum estrogens among postmenopausal women treated with the same transdermal estrogen therapy and the effect on androgens and sex hormone binding globulin 
Ginger R Kraemer, M.A., Robert R Kraemer, Ed.D., Beverly W Ogden, M.D., Robin E Kilpatrick, M.D., Terry L Gimpel, V.Daniel Castracane, Ph.D. 
Fertility and Sterility 
Volume 79, Issue 3, Pages (March 2003)
DOI: /S (02)

2. FIGURE 1
Values represent mean (± SE) concentrations of (A) estradiol, (B) estrone, and (C) estrone sulfate during continuous estrogen patch (•), new estrogen patch (□), and placebo patch (▴) treatments.
Kraemer. Estrogen replacement and variability. Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (02) )

3. FIGURE 2
Series represent each woman’s individual estradiol concentrations across treatment days.
Kraemer. Estrogen replacement and variability. Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (02) )