Osteogenesis imperfecta is a clinically heterogenous disease caused by defective collagen syntesis associated with a mutation in the COL1A1 or COL1A2 genes. In this report. we present a case of osteogenesis imperfecta (OI) type IV. seen in a female fetus with incurved femurs at 18 weeks of gestation. https://www.alexmatia.com/product-category/books/