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Clinical value of fetal spontaneous movements in early pregnancy

With the B-scan ultrasound technique the ultrasound waves of a certain wave-length emitted by an emitter are partially reflected in the body from the Interfaces of media with different sound conductivity. These echoes are transformed into electrical impulses by a receiver and directed towards a cathode tube. A cross sectional picture through the body's interior is obtained on the luminescent screen. It is possible with automatic and rapid picture formation to observe continuously movements in the body's interior. They diSer from glimmer and artefacts of the rapid picture formation. We paid special attention to spontaneous movements of the fetus within the amniotic fluid during the first half of pregnancy. It has been possible to observe spontaneous movements of fetuses only in aborted or surgically obtained fetuses. Consistent studies have been mainly concerned with observations of reflex movement induced by external Stimuli. Even under optimal conditions, the physiological circumstances of these studies were not conductive to an understanding of fetal behaviour in utero.