infancy

Physical development:

Babies are born with a number "primitive reflexes"

A reflex is an involunatry action in response to a stimulus which activates it.

that are:  Rooting Reflex, Suckling, Grasp and Walking Reflex

Development milestone:

Development milestone refers to expected sequence of development most child should achieve by a certain age.

Intellectual development:

Infants are interested human faces and bright shiny objects and …