Abigail Elizabeth Degenaar arrived on June 24, 2004! She was born with a rare genetic disease called Osteogenesis Imperfecta, more commonly called Brittle Bone Disease. Osteogenesis Imperfecta is characterized by bones that break easily, often from little or no apparent cause. Abigail's family would like to use this site to share with others their experiences of having a baby with Osteogenesis Imperfecta (OI).