Non-visualisation of the fetal stomach on ultrasound can occur with various physiological as well as pathological processes. It becomes a significant sonographic observation >14 weeks of gestation (about the time the fetus begins to swallow). Causes include: - physiological emptying: transient - lack of amniontic fluid to swallow - oligohydramnios and its various causes - anhydramnios and its various causes - impaired fetal swallowing - certain forms of oesophageal atresia: particularly those without a tracheo-oesophageal fistula - obstructing oropharyngeal mass - cervical teratoma - epignathus - CNS abnormalities - facial clefts - neuromuscular disorders - microgastria - congenital diaphragmatic herniation: fetal stomach may be absent in an axial ultrasound scan - standard view due to migration into the thorax If there is non-visualisation of the fetal stomach >18 weeks, there is an 85% chance of an abnormality. So kindly visit your obstetrician at the earliest with your reports so that the follow up procedures can be done at the earliest.