The article is a review of different trends and epistemologies in women’s studies/feminist research within the field of medicine. In the beginning of the 1980s, women’s studies entered the field of medicine in the Nordic countries. They are now a part of the feminist research that has been established within most sciences both nationally and internationally. The gender power relation and its impact on health - first of all women’s, but in extension also men’s - has been in focus. Moreover, science itself, its limits and possibilities, and the kind of knowledge it produces, is discussed. In this respect, feminist theory of science is a useful tool.