When Do Babies Start Teething?

Your baby's teeth take a long time to form. Their teeth start developing long before the first one pokes through the gum. Learn how your baby's teeth will grow.

Early Formation: Teeth Start Early

  • Teeth begin to form in the unborn fetus between 4 and 6 weeks. This is when the basic substance of the tooth forms.
  • Around 3 months into the pregnancy, the hard tissue that surrounds the teeth forms. This process is called mineralization.

The First Years: Teething & Baby Teeth

  • Sometime between 3 to 12-months old, your child's primary, or baby teeth will begin to protrude (or erupt) through the gum.
  • Each tooth has a visible surface above the gum called a crown. You can't see them, but they also have one, or more, roots extending into the gum.
    Get more information about your baby's teeth, and the order in which you should expect them to emerge by reading Teething Chart: See When Your Baby's Teeth Will Come In

Room to Grow: Permanent Teeth

  • Eventually, your baby will get 20 primary teeth.
  • A few years later, starting around 6 years old, the primary teeth fall out and are eventually replaced by 32 permanent teeth.
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