1. Estrogen therapy increases plasma concentrations of nitric oxide metabolites in postmenopausal women but increases flow-mediated vasodilation only in younger women 
Patricio López-Jaramillo, M.D., Ph.D., Luis Alfonso Díaz, M.D., Alberto Pardo, M.D., Gustavo Parra, M.D., Hermes Jaimes, M.D., Gautam Chaudhuri, M.D., Ph.D. 
Fertility and Sterility 
Volume 82, Issue 6, Pages (December 2004)
DOI: /j.fertnstert
Copyright © 2004 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Plasma concentrations of nitrite plus nitrate after placebo or ET periods (mean ± SEM) in the 40 patients included in the study (top; *P=.001) and by age groups (bottom; *P=.007, **P=.020, ***P=.0025, and ****P=.032).
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2004 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Effects of E therapy on the percentage change in flow-mediated vasodilation in the 28 women suitable for statistical analysis (mean ± SEM; top; *P=.018) and by age group (bottom; *P=.04, **P=.54).
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2004 American Society for Reproductive Medicine Terms and Conditions