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The Age Ranges for Newborns, Infants, and Toddlers - Parents
Difference Between Baby, Newborn, Infant and Toddlers Explained
Baby vs. Infant - What's the Difference? - This vs. That
About Newborn, Infant, Baby & Toddler Age Ranges | Pampers
Infant - Wikipedia
Differences Between a Baby, Newborn, Infant, and Toddler - MSN
Infant development: Birth to 3 months - Mayo Clinic
Baby Development Stages in the First Year: Month by Month - Healthline
Infant development: Milestones from 4 to 6 months - Mayo Clinic
Infant and toddler health Newborn health - Mayo Clinic