High percentile measurement at 20w scan?

D • 30, UK 🇬🇧 Mama to a 34 week preemie 💙

So I had my 20w scan today and baby is measuring 86% percentile, meaning he’s quite a bit bigger than average 🙈 (50% is average).

Does this mean he will be quite a high birth weight? Is there any correlation?

Just wondering as I was only 5lb myself and hubby was 7lb- so didn’t think I’d be expecting a big baba 😅

Also- he was only 37% at my 12w scan!?