Children typically lose 20 baby teeth, also known as primary or deciduous teeth, between about ages 6 and 12. These 20 baby teeth are eventually replaced by 32 permanent adult teeth

. The process usually begins around age 6, although it can start as early as 4 or as late as 7. The last baby teeth generally fall out by age 12 to 13

. The permanent teeth that replace them include not only the 20 succedaneous teeth but also 12 additional molars (including six-year molars, twelve-year molars, and wisdom teeth) that do not replace any baby teeth

. In summary:

• Number of baby teeth lost: 20
• Age range for losing baby teeth: roughly 6 to 12 years old
• Number of permanent teeth that replace them: 32 (including molars that do not replace baby teeth)

This tooth loss and replacement is a natural part of children's development as their jaws grow and accommodate larger, permanent teeth