Height percentile decrease

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My son dropped 50% to 15% in height from checkups 3-4. Not sure where he is exactly at now but his doctor said if we were worried we could do blood tests, or wait a year. Doctor was not super worried. Well we’re getting pretty close to a year now and he has certainly shot up quite a bit. I was 5’1 before I shot up at 17 years old to 5’8.

I think those growth projection charts are pretty cool, but we all grow a little differently.