Changes in humans before and after birth

Humans are mammals, they grow and develop inside the mother's womb for nine months until they are born. When human babies are born they cannot survive by themselves. Humans are considered as babies up to 12 months of age, as they learn to focus their vision, reach out and explore. Up until they are six months old, babies don't eat normal food, they only drink milk. The stages of human development as a baby can be recorded in a variety of ways.