Describir: Review: estrogen alone increases endometrial hyperplasia in postmenopausal women...commentary on Lethaby A, Farquhar C, Sarkis A et al. The association of oestrogen, oestrogen-progestogen and placebo with endometrial hyperplasia and irregular bleeding in the menopause. Cochrane Review, latest version 24 Feb 1999. In: The Cochrane Library. Oxford: Update Software