5 Pharmaceutical, veterinary or medical preparations for expansion, selection and implantation of human, in vivo, cartilage forming cells; and for controlling the quality of implants before they are implanted into patients; pharmaceutical and medical preparations, namely, nutritious media and substrates for expansion, selection and implantation of human, in vivo, cartilage forming cells including stem cell preparations or stem cell implants for controlling the quality of implants before they are implanted into patients; medical preparations, namely, polymer preparations and cell matrices of any type of origin for expansion, selection and implantation of human, in vivo, cartilage forming cells including stem cell preparations or stem cell implants for controlling the quality of implants before they are implanted into patients; test products for medical use, namely, nucleic acid probes, medical diagnostic reagents, antibodies for the purpose of the control of expansion, selection, and implantation of human, in vivo, cartilage forming cells including stem cell preparations or stem cell implants; hormones and means for the promoting of the growth of cells, namely, so called growth factors for medical use; enzymes for medical use; antibodies for medical use, for the purpose of expansion, selection and implantation of human, in vivo, cartilage forming cells including stem cell preparations or stem cell implants, and for controlling the quality of implants before they are implanted into patients