The document outlines the typical developmental milestones of infants from 1 month to 12 months of age. These include gross motor skills like grasping, sitting, crawling, and walking with support. Communication milestones involve cooing, copying sounds, understanding words, and saying first words. Sensory milestones include vision developing to adult levels by age 1 and hearing being fully developed from birth. Weight is also an important milestone to monitor monthly.