FirstWeeksYour baby at 12 weeks: almost three months
Medically-informed · Sources: CDC · Updated June 2026
The newborn fog is lifting: more laughter, longer awake windows, real personality.
What’s happening
Crying curve bottoming out
For most babies daily crying is clearly less than a month ago.
Push-ups in tummy time
Chest comes off the floor on forearms; some babies attempt tiny pre-rolls — never leave baby on raised surfaces.
Chuckles and squeals
First laughs commonly land around 3–4 months; the warm-up sounds are here.
What to do
- Childproof changing routines: one hand on baby, always
- Stretch awake windows gently — overtired babies sleep worse, not better
- Celebrate: you got through the hardest quarter
When to check in
Not holding the head up in tummy time, or not smiling at people by 3 months — discuss at your next visit.
Skills to watch this week
- 10–13Faster smiles for familiar faces — Known people get instant warmth; strangers get study.
- 9–13Bats and swipes at objects — Aims at dangling toys; contact is the victory.
- 9–13Briefly holds a toy — Keeps a light rattle in the grip for a few seconds.
- 9–13Pushes up on forearms — Mini push-ups raise the chest in tummy time.
- 9–13Steadier head held upright — Less wobble when carried or held sitting.
- 9–13Squeals and gurgles — Volume experiments — the voice is a new toy.
Every baby has their own pace — ranges are typical, not deadlines.
This is exactly what FirstWeeks shows you — matched to your baby
Week 12 guidance, skills to watch, and answers that know your baby’s age and log.
