I wanted a girl, desperately, possibly because my Mum died when I was v. young and don't feel I ever had that special relationship. DH wanted a boy. Neither of us really really wanted to know. Our local authority charge £50 to tell you at a special scan or they refuse. We went into the scan thinking, if we saw something that confirmed the gender, then it was meant to be. ..... but we didn't!
On the day, after 36 hours of contractions every 3 minutes (induced - badly!) and an awful, traumatic birth, they put this little blob covered in blood and meconium on me, facing away from me and I was sooooo relieved to see the leg twitch. I asked what the gender was and they said have a look and lifted the bottom, but because of all the gunk, what could have been girl bits could also have been the underside of boy bits IYSWIM.
When they told me it was a girl, it was the BEST surprise ever!! Waffled on there, but it was lovely not knowing (and I'd called her "he" all the way through my pregnancy, quite happily!).
Oh, and the comment about yellow clothes - I hate pink but LOVE my daughter in white, white, white!! (and now she's a bit bigger, creams and a few other colours!)