BMP-7(osteogenic protein- 1) is produced in the kidney and in the nervous system. It is produced also by human fetal trophoblasts in vivo and may be involved in the regulation of the synthesis of chorionic gonadotropin and progesterone by trophoblasts. BMP7 induces new bone growth, and forms heterodimers with BMP2A. The factor is a member of the TGF family of proteins.