Overview Aging and Estrogen on Cortical Function Status: Completed Trial end date: 2013-12-02 Target enrollment: Participant gender: Summary This study will focus on how estrogen affects parts of the brain associated with memory and how the effect of estrogen is altered with aging in postmenopausal women. Phase: Phase 1/Phase 2 Details Lead Sponsor: Massachusetts General HospitalCollaborator: National Institute on Aging (NIA)Treatments: EstradiolEstradiol 17 beta-cypionateEstradiol 3-benzoateEstradiol valerateEstrogensPolyestradiol phosphate