Gender guess at 12-13 weeks

My doctor (obgyn) did a scan on me at 12-13 weeks and asked me if I wanted him to guess what he thought my babies gender was. I said yes. He said he was 70% sure it is a boy.

Has anyone been told something similar so early on and found it to be wrong?

I am a bit suss being so early on.

Any feedback or personal experience would be appreciated.

Thanks ❤️