Effect of tibolone on endometrium of castrated rats].. *J. A. Pantaleão, H. N. Henriques, A. C. D. de Carvalho, Carlos Eduardo ... Recent advances on the action of estrogens and progestogens in normal and pathological human endometrium ... causing proliferation in the endometrium and causing changes in the cell differentiation (squamous metaplasia), but do not lead ...