Fetal imaging by nuclear magnetic resonance: a study in goats. Work in progress.

Abstract
NMR proton imaging was used to obtain images of goat fetuses in utero. The long T1 relaxation times of amniotic fluid makes it appear black on proton density images when examined using the Aberdeen imager, and so allows very good discrimination of the position and structure of the fetus. Some fetal internal tissues can be seen on T1 images. Apparently, NMR imaging has great potential in [human] pregnancy studies.