[Fetal digestive tract imaging].

The exploration of the fetal digestive tract is not systematized and the ends (thoracic oesophagus and anorectal area) are often excluded from the examination excluded from screening. Only the foetal digestive pathology of liquid expression (digestive obstruction, digestive duplication) is easily detected. The most frequent digestive pathologies (oesophagus atresia, anorectal malformation) are still very often a neonatal discovery. With echography or MRI, the antenatal analysis of the digestive tract is optimized by the acquisition of coronal (thoracic oesophagus, small intestine, and colon) and sagittal median cuts (rectal reference mark, sacral concavity). The interpretation of the echosignal of the contents of the digestive tract (liquid or meconial) takes into account the transition periods responsible for the physiological modifications in charge of the modification of images (24-26 WA and 29-30 WA).