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Infant development: Birth to 3 months - Mayo Clinic
Newborn baby: Development, milestones & growth - BabyCenter
Newborn Development: 0-1 month - Children's Hospital of …
Newborn Age Range: How Long Is the Newborn Stage? - TheBump.com
The Newborn Stage: What Is It? And When Does It End? - New Baby …
Baby Development Stages: The First Year - WebMD
A Week-by-Week Guide to Your Baby's First Year Milestones - Parents
Baby Development Stages in the First Year: Month by Month - Healthline
How Long is the Newborn Stage? A Quick Guide for New Parents
When Does the Newborn Stage End? A guide from a pediatrician