Children’s first teeth begin forming inside the womb but do not break through the gum line until after birth.
Their teeth begin to come out when they are about four months old and dependent on the child, their full set of baby teeth can be fully erupted by the age of three.
This is a predicted time span of when baby teeth will come out:
Roughly around six years old, a child’s baby teeth begin to set up for their replacement teeth which starts generally with the molars first. Permanent teeth haven’t fully settled in until the the person is about twenty one years old.