We found out but were given the "not 100% sure coz we can't see all the bits due to the cord" speech.

Not many people wanted to know and I got quite a few lectures espically from MIL for finding out.
As PIL didn't want to know we kept it from them but when I was in hospital I kept refering to bub as "she" and then after a week with me in hospital we had chosen her name and referred to "her" as Nikita or Niki so poor MIL found out anyway

I think you should wait and see - if people ask if you know say "yes we do" and leave it up to them to enquire further what the sex of your baby is. You can monitor their response and see if you actally want to share your news with them or not?!

Nae x