What are the symptoms of Down’s baby, clinical manifestations of Down’s baby: First, the delay in intellectual development. For example, normal children can appear to lift their heads after 3 months, at 6 months the child will sit, and at 9 months the child will crawl. Down’s babies are more retarded, by 6 months the head may still not lift well, by 9 months or 1 year old still can not sit, appear to sit unstable, this is a motor problem; second, there is a significant retardation in intelligence, normal babies after 3 months eyes can follow people around, left and right look, but Down’s babies are significantly behind the development of the third, the child’s muscles are more relaxed, the movement is also more retarded; Fourthly, Down’s babies have typical facial features, such as wide eye distance, upward sloping external eye muscles, and small external ears; fifthly, the fontanelle is larger, and the most common skin texture is through the hand; sixthly, about 50% of Down’s babies are prone to congenital heart disease, about 30% are prone to congenital digestive tract malformations, and most children are prone to leukemia when they grow up.