Effect on cognition of women because of oestrogen replacement therapy via Magnetic Resonance Imaging (MRI)

Placebo controlled study of the effect of oestrogen replacement therapy on cognition in postmenopausal women, including fMRI of verbal fluency and mental rotation in ~40 subjects prior to and after 6 months of treatment.

This project holds controls and non-controls but this information should not be set on the subjects until the analysis is completed (blind study).