Dumb Blonde Joke No.431

A Blonde a Brunette and a Redhead are in the doctor's office one day (all of them pregnant) All of them started talking about their pregnancy's and the Brunette said "I'm going to have a girl, because I was on top when we had sex." The Redhead said "I'm going to have a boy because I was on the bottom when we had sex." Then the Blonde started crying and said "I'm going to have puppy's ..."