This review aims to summarise the known or potential role(s) for BMP13 in a variety of biological systems.Keywords: BMP13, Cartilage, Growth Factor, Development, BoneIntroductionBone Morphogenetic Protein 13 is a member of the wider Bone Morphogenetic Protein (BMP) family, a group of bio-active growth factors with 20 ??? 30% amino acid homology to Transforming Growth Factor ?? (TGF??).