Sonographic demonstration of fetal death in the absence of radiographic abnormality. 
A case of intrauterine fetal demise was monitored over a 5-week period with serial sonographs and simultaneous radiographs.  The diagnosis could not be established from the radiographs even 7 weeks postmortem.  However, the initial sonographs established the diagnosis and subsequently presented a picture of increasing degeneration.  Possible explanations for this are suggested.