Biliary atresia is a disease that affects children in the first weeks of life. The tubes which connect the liver to the intestine become damaged and blocked. Babies with biliary atresia will have jaundice (yellow eyes and skin) and pale stool (poo). Babies usually look otherwise well.  It is common for babies to be mildly jaundiced in the first week of life. However, if your baby is  deeply jaundiced  (very yellow eyes and skin)  and is still jaundiced after 2 weeks of age and/or has pale stool they need an urgent blood test.  If the blood tests suggest they may have biliary atresia they will be admitted to hospital urgently for further testing and possible surgery.