"Multicolored birth" joke

A woman is just about to give birth in the hospital when she says to the doctor, "Doc, do me a favor. Tell me what color the baby is as it's being born."
The doctor is understandably a little puzzled at this.
"Why? Don't you know what colour the child is going to be?"
"Well", says the woman, "The problem is that I'm a porno actress and the child was conceived during the making of a film. I have no idea who the father is."
"Okay", says the doctor, "I'll do it for you but it is most unusual."
The baby begins to be born and the doctor says, "Here comes the head! It seems to have yellow skin and the eyes are slanted. Was one of the actors Chinese?"
"Yes, doctor he was.", says the woman.
"Wait", says the doctor, "The chest and arms are out and they seem to be very dark. Was one of the actors black?"
"Yes, doctor he was."
"Wait, now the legs are out and they're very fair. Was one of the actors Norwegian?"
"Yes, doctor he was."
So the doctor pulls the baby free and gives it the traditional slap on the backside. The baby lets out a healthy "Waaaahh" and starts crying.
"Oh, thank God for that!", says the woman, "For a moment there, I expected it to bark!