Sidney S, Petitti DB, Quesenberry CP Jr
Myocardial infarction and the use of estrogen and estrogen-
progestogen in postmenopausal women
Ann Intern Med
(Oct) 127:501-508 1997

So you thought that prescribing estrogen/progesterone to your peri- and
postmenopausal patients protects them against heart disease in addition to
maintaining their bone
mass? In the words of Sammy Davis Jr.
in the American Operetta Porgy and Bess, "It Ain't Necessarily So!".
The
full text
of this paper is available from the ACP site.