By the time the baby is 9 months old, the body can gradually leave the ground, and the hands and feet begin to crawl alternately. At this time, the baby's crawling will be smoother.
Baby crawling helps to promote brain development. For babies, more crawling can enrich the neural connection between cerebellum and help the brain develop better.
When the baby learns to crawl, he crawls forward slowly with the same hand and foot, and then his hands and feet cross forward, which enhances the flexibility of his limbs and muscles, and also helps to develop good balance bar and hand-eye coordination.