[1]Institute of Materials Science and Technology TU Wien Vienna Austria;
[2]Austrian Cluster for Tissue Regeneration Austria;
[3]Institute of Applied Synthetic Chemistry TU Wien Vienna Austria;
[4]Polymer Chemistry and Biomaterials Group Centre of Macromolecular Chemistry Ghent University Ghent Belgium;
[5]Brussels Photonics Department of Applied Physics and Photonics Vrije Universiteit Brussel Brussels Belgium;
[6]Ludwig Boltzmann Institute of Experimental and Clinical Traumatology Vienna Austria;
high resolution 3D printing; placental barrier; model; microstructure; two-photon polymerization;