A newborn baby is an infant who is typically less than one month old. At this stage, babies are completely dependent on their caregivers for survival. They are born with reflexes that help them feed, such as the rooting reflex, which helps them find the breast or bottle. Newborns usually sleep a lot, often up to 16-18 hours a day, waking only for feeding and diaper changes. During the first few weeks, a newborn baby undergoes rapid growth and development. Their senses are developing, and they can see, hear, and feel their surroundings. Newborns also begin to recognize their caregivers' voices and scents, which helps strengthen the bond between them and their parents.