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Baby

Baby by month

Learn about the growth and development of your infant with our baby-by-month guide, detailing the changes and milestones of their early weeks and months.

Your baby: 3 weeks old
Baby by month

Your baby: 3 weeks old

Growth spurts, cluster feedings and tips for soothing your fussy, gassy baby. Learn all about your 3-week-old.

Today's Parent

7 minutes
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