How many people were told they were having a boy and then had a girl? Or vice versa?

When I was 5 months pregnant I was told I was having a boy , they showed me what looked to be his manhod. My babyshower was everything to do with a boy, even my nursery.1 week before I was schelduled to give birth, I got another ultrasound, only to find I was having a girl. Sure enough she is a girl, she's 6 months old. Needless to say she has alot of blue stuff.