Baby not growing much in length

Ja

Hi!

FTM. Baby boy was born 6lbs14oz 20 inches long and now at 9 weeks he’s 13lb6oz and only 21 inches long. And his head is at 42cm so in the 90th percentile. Doctor didn’t seem too concerned with his length or head and she said we will just have to wait and see what happens in the next couple of months before she would be concerned enough to do any testing.

Does anyone else have a LO that was 21 inches long at 2 months of age? And only grown around 1 inch in length?

Trying not to worry but this percentile stuff has my head spinning.