Vomiting is a kind of common phenomenon of newborn time.It is because of esophagus, stomach, intestinal tract antiperistalsis and abdormal muscles and diaphragm muscle spasmodic contraction.

• 呕吐是新生儿期较常见的一种现象,是由各种原因引起的食道、胃、肠道逆蠕动,并伴有腹肌或隔肌发生不同程度的痉挛性收缩所致。