According to an article published in the September 2012 issue of Aesthetic Surgery Journal a study in twins revealed several factors which influence the appearance of breasts while aging. The study performed by researchers at Case Western Univ. compared identical twins to eliminate genetic influences and focused primarily on external factors. What they discovered was that moisturizing the (breast) skin led to fewer wrinkles, post-menopausal hormone replacement led to more attractive breasts with better shape, areolar size, and projection. Conversely, women with any of the following: greater body weight, more pregnancies, larger cup sizes, smoked or consumed alcohol had less attractive breasts.