"infant" is typically applied to young children under one year of age; however, definitions may vary and may include children up to two years of age.
Newborn usually refers to babies from birth to about two months of age. Infants are babies from two months to one year old. Toddlers are babies from one year to four years of age.
Childhood is the time for children to be in school and at play, to grow strong and confident with the love and encouragement of their family and an extended community .
Some people believe conception to the be moment at which the egg is fertilised by a sperm, while others prefer to think of it as the moment that an early stage .