Why milestone ranges are wide

Developmental milestones happen across a range, not on a fixed date — a baby who sits independently at 5 months and one who does it at 8 months are both entirely typical. What matters more than hitting a milestone at a specific age is the overall trajectory over time.

When to talk to your pediatrician

Mention it at your next well-visit if your baby hasn't reached several milestones from an earlier age bracket, or has lost a skill they previously had. Most of the time this leads to reassurance, but your pediatrician can properly evaluate anything genuinely worth a closer look — this tool can't replace that.

My baby seems behind in one area but ahead in another. Is that normal?

Yes, very common — babies often develop unevenly across motor, language, and social skills rather than progressing at the same pace in every area simultaneously.

KEEP A RECORD FOR YOUR PEDIATRICIAN

Save every milestone as it happens.

BabyQuil builds a timeline of your baby's milestones automatically, ready to share at your next appointment.

Get BabyQuil — free on iOS