Milestones 0: Baby Milestones 0-12 Months: A Month-by-Month Guide

Tracking your baby’s developmental milestones is one of the most exciting — and sometimes worrying — parts of parenthood. Every baby develops at their own pace, but understanding the general timeline helps you know what to expect, celebrate each achievement, and recognize when to talk to your pediatrician. This month-by-month guide covers the key milestones from birth to 12 months, focusing on motor, language, social, and cognitive development.

Why Milestones Matter

Developmental milestones are skills that most children (about 75%) can do by a certain age. They serve as useful guideposts, not rigid deadlines. The American Academy of Pediatrics (AAP) updated their milestone checklists in 2022 to reflect what most children achieve at each age, making it easier for parents to track development and identify potential delays early. Early identification of developmental delays leads to early intervention, which significantly improves outcomes.

Month-by-Month Milestones

0-3 Months

• Lifts head briefly during tummy time
• Follows objects with eyes
• Startles at loud sounds
• Makes cooing sounds
• Smiles socially by 2 months
• Brings hands to mouth

3-6 Months

• Rolls from tummy to back (by 4 months) and back to tummy (by 6 months)
• Sits with support
• Reaches for and grasps objects
• Babbles with consonant sounds
• Laughs and squeals
• Recognizes familiar faces

6-9 Months

• Sits without support
• Bounces when standing with support
• Uses raking grasp to pick up objects
• Responds to own name
• Babbles with repeated syllables (“bababa,” “dadada”)
• Shows stranger anxiety

9-12 Months

• Pulls to stand and cruises along furniture
• Pincer grasp (picks up small objects with thumb and finger)
• Says first words (“mama,” “dada,” “bye-bye”)
• Uses gestures (pointing, waving, shaking head)
• Plays peek-a-boo and pat-a-cake
• Understands simple commands (“come here,” “give me”)

When to Talk to Your Pediatrician

Contact your pediatrician if your baby hasn’t achieved these milestones by the expected age range. Trust your instincts — you know your baby best. If something feels off, don’t hesitate to bring it up at your next well-child visit or call the office between visits. Early intervention is most effective when started early.

Related: 3-6 Month Milestones | 6-9 Month Milestones

Disclaimer: Developmental milestones are guidelines, not deadlines. Every baby develops at their own pace. Consult your pediatrician for personalized guidance.