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What Age Is An Infant, Baby, Newborn, and Toddler? - Parents
Ages & Stages - HealthyChildren.org
Infant development: Birth to 3 months - Mayo Clinic
Baby Development Stages in the First Year: Month by Month - Healthline
Newborn baby: Development, milestones & growth - BabyCenter
Baby - HealthyChildren.org
About Newborn, Infant, Baby & Toddler Age Ranges | Pampers
Baby | BabyCenter
Baby Growth and Development Month by Month - What to Expect
Baby Development Stages: The First Year - WebMD