We didn't want to know and didn't find out through any of our scans. We went into the scans telling them that we definitely did NOT want to know and both DP and I admitted that when we walked out of our 18-20 week scan we had both been trying to sneak peeks during the scan but both couldn't see anything (we knew about the stripes too LOL), the sonographer did the check over the genital either very discreetly or DP and I are simply not very good at picking up any details LOL

Our Obs on the other hand would always ask at each appointment what I was having and I would answer "I don't know" and he would say "ok, best get off that part of the screen then" LOL he never gave it away though did have me wondering why he had to keep asking LOL