 This study compares the accuracy of fast magnetic resonance imaging MRI using the half Fourier single shot rapid acceleration with relaxation enhancement technique to ultrasound in the diagnosis of fetal abnormalities. The investigators specific aim is to perform MRI examinations with ultrafast MRI on fetuses with sonographic morphologic abnormalities. The investigators hypotheses are that 1 MRI will demonstrate fetal morphologic abnormalities; and 2 MRI will add additional information to the sonographic diagnosis which may directly affect maternal andor neonatal care. 