Re: Book Wrong!!
My understanding of sex organ development is just what FirstTimeMomma said. It develops and starts getting visible that early, but not clear on a sonogram. I've also read in several books that the sex organs look like boy parts earlier on, and after week 16 or 17, the female parts will start taking their shape.
The parts are clear to see around week 20 (when they are typically doing the 20-week sono), so that's why they like to wait.
I had an amnio at 17 weeks and both docs agreed it was a girl at that time...they both said she was in exactly the right position to see it that clearly that early. Amnio results confirmed it's a girl.
As for the hot dogs, you will be fine. Actually, a chili cheese dog sounds AWESOME to me right now. Earlier on in my pregnancy, my everyday lunch for about 2 weeks straight was a package of Ramen noodles cooked down nice & thick with cut-up hot dogs, and covered in cheese. Every single day. Didn't matter what flavor of noodles I had...beef & hot dogs, chicken & hot dogs, shrimp & hot dogs, oriental & hot dogs, mushroom & hot dogs...yum!