The invention relates to a membrane which can be used for cultivating cells, in particular adherent cells, wherein said membrane allows for the adhesion and proliferation of the cells based on its specific composition comprising polyurethane and the resulting surface characteristics further allow the membrane to be used without any pre-treatment with surface modifying substances. The invention further relates to a method for preparing a membrane which can be used for cultivating cells, in particular adherent cells, and to methods of using such membrane for cultivating cells, in particular adherent cells.
