3-Month Baby Development: Head Control, Cooing, Social Smiles
At 3 months, babies change noticeably. They smile more, respond to sounds, and start showing interest in the world.
Physical Development
Weight and Length
- Weight: About double birth weight (avg 12-14 lbs)
- Length: About 23-25 inches
- Head circumference: Growing rapidly
Motor Development
Head Control The biggest change at 3 months. Can lift head 45 degrees when on tummy.
Hand Use
- Reaching for objects
- Staring at own hands
- Opening and closing fists
Leg Movement
- Kicking while lying down
- Playing with feet
Cognitive Development
Vision
- Recognizes faces at 12 inches
- Tracks moving objects with eyes
- Prefers bright colors like red and blue
Hearing
- Distinguishes mom's voice from others
- Turns head toward sounds
- Responds more to high-pitched speech
Memory
- Recognizes familiar faces and smiles
- Starting to anticipate daily routines
Social Development
Social Smiling
The highlight! Real smiles appear - intentional smiles when seeing someone.
Communication
- Cooing begins (ah, ooh, goo)
- Tries to "talk back" when spoken to
- Expresses emotions through facial expressions
Attachment
- Recognizes primary caregiver (usually mom)
- Feels secure when held
- Still smiles at strangers (before stranger anxiety)
Play Ideas
Tummy Time
3-5 times daily, 3-5 minutes each. Important for neck and shoulder muscles.
Rattle Play
Shake sound-making toys. Great for visual tracking and hearing.
Mirror Play
Place a safe mirror in front of baby. They find their reflection fascinating.
Songs and Talking
Look at baby's eyes while talking and singing. Foundation for language development.
Warning Signs
Consult your pediatrician if:
- Can't hold head up at all at 3 months
- No response to sounds
- No eye contact
- No smiling
- Never opens hands (always fisted)
Frequently Asked Questions
Q: My 3-month-old can't roll over
Normal! Rolling usually starts at 4-6 months. Help muscle development with tummy time.
Q: Do they sleep through the night?
Varies by baby. Some sleep 5-6 hours, but waking every 2-3 hours is still normal.
Q: Not cooing yet
Cooing may not start fully in early 3 months. Watch until 4 months.
Track Development with BebeSnap
Record precious 3-month moments:
- Log date of first social smile
- Record when head control started
- Save growth milestones with photos
References
Manage Easier with BebeSnap
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