Has anyone who didn’t find out the gender of their little ones have the ultrasound tech say “he/she” on accident and it be incorrect of how they described it?

Example: we are not finding out the gender of our baby and the tech knew that. But half way through she said “his” and “he”. I’m not sure if it’s just default for them, or if I should be mentally prepared for another little boy.

I told my dr (she knows and she is also our friend) and she said I shouldn’t base it on that because that’s just a default for most people. Is she trying to cover her tracks and keep it a secret or has anyone else experienced this?