A newborn is actually an infant when they are born.
However a newborn is when a baby is first born and until they are about 2 months of age.
Most people consider a newborn to be an infant by 1 month to 2 months of age but in reality an infant is a baby from birth until around 1 year of age.
Then after 1 year of age the baby is considered a toddler until around 2 to 3 years of age.
Although some people consider a baby a baby until age 4 years of age.
The infant stage though is considered to be from 0 to 1 year of age.
Usually by week 10, babies are less fussy, start going to bed earlier, and become more peaceful little creatures.
Plan for it.
Tell yourself it is coming whether you 'fix it' or not.
Know that you can get there even when it is really hard, tell yourself that you will make it to week 10.
An infant (from the Latin word infans, meaning 'unable to speak' or 'speechless') is a formal or specialized synonym for the common term baby, meaning the very young offspring of human beings.
The term may also be used to refer to juveniles of other organisms.
A newborn is, in colloquial use, an infant who is only hours, days, or up to one month old.
In medical contexts, newborn or neonate (from Latin, neonatus, newborn) refers to an infant in the first 28 days after birth; the term applies to premature, full term, and postmature infants.
Before birth, the term fetus is used.
The term infant is typically applied to very young children under one year of age; however, definitions may vary and may include children up to two years of age.
When a human child learns to walk, the term toddler may be used instead.