We present one case of a 23 week old fetus that was diagnosed with osteogenesis imperfecta type II via ultrasound, The principal ultrasonographic findings were; lack of mineralization in the calvaria, short, wide, and angulated femurs, with the presence of fractures, the length corresponds to a 17.5 week old gestation, more than two standard deviations below the mean for gestational age. The rest of the long bones show fractures and poor mineralization that was suggested by reduced acoustic shadowing. An elective cesarean was programmed at 39.4 weeks of gestation. The osseous lesions were confirmed postnatally by means of a conventional radiographs.