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  1. Infant development: Birth to 3 months - Mayo Clinic

  2. Infants (0-1 years) | CDC

  3. Infant - Wikipedia

  4. What Age Is An Infant, Baby, Newborn, and Toddler? - Parents

  5. infant and toddler development - Encyclopedia Britannica

  6. Baby Development Stages: The First Year - WebMD

  7. Infant development: Milestones from 4 to 6 months - Mayo Clinic

  8. Infants & Toddlers (Ages 0-3) - Milestones & Schedules

  9. Baby - HealthyChildren.org

  10. Infant growth: What's normal? - Mayo Clinic