Week-by-week library · about 9 weeks old
Week 9
Quick answer
What is my baby up to at about 9 weeks old?
This week, another growth spurt may shake up the routine you just found.
What's developing
Growth
A second common growth spurt window falls around this age for many babies, which can briefly disrupt feeding and sleep patterns.
Motor
Arm and leg movements are becoming smoother and more purposeful, less of the earlier jerkiness.
Try this together this week
- Ride out a fussier or hungrier few days without assuming something changed for the worse; a spurt is a strong candidate.
- Batting practice: dangle a soft toy just above their hands during alert time.
- Continue the coo-and-respond game; some babies add new sounds around now.
- A short outdoor stroll, weather permitting; new sights and sounds are stimulating in a good way.
What parents often notice
A stretch of extra clinginess or hunger this week is common and usually resolves within a few days on its own.
Sourced to
- American Academy of Pediatrics, HealthyChildren.org
Last reviewed by the This Week Baby editorial team.