Clinical features : The presence of maternal polyhyramnios and single umbilical aery should ale the pediatrician to look for atresia of the upper GIT.Association of congenital anomalies of veebrae, anorectal region,hea,kidneys or limbs should arouse suspicion.The newborn baby has excessive drooling ,saliva is frothy and there is choking and cyanosis with first feed.Overflow of milk and saliva from oesophagus, and regurgitation of secretions through the fistulous tract into the lungs is present. Ref : ESSENTIAL PEDIATRICS,O.P.GHAI,PG NO:151,7th edition