Engraftment potential of human Amniotic Fluid and Bone Marrow Stem Cells cultured in expansion and osteogenic conditions in a Fetal Sheep Model

1 3B’s Research Group, Dept. of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Zona Industrial da Gandra, S. Claudio do Barco, 4806-909, Caldas das Taipas, Guimaraes, Portugal, www.3bs.uminho.pt 2 IBB – Institute for Biotechnology and Bioengineering, PT Government Associated Laboratory , Portugal 3 Dept. of Veterinary Sciences, University of Tras-os-Montes and Alto Douro, Vila Real, Portugal 4 Genetics Dept., Faculty of Medicine, University of Porto, Porto, Portugal 5 CECAV Centre for Animal Science and Veterinary , Dept. of Animal Sciences, University of Tras-os-Montes and Alto Douro, Vila Real, Portugal