Top or Bottom - Boy or Girl

There were women waiting in a doctor's office.

They started talking and one women said, "I'm going to have a girl because I was on the bottom last time and I had a girl. I was on the bottom again this time so I'm going to have another girl."

One of the other ladies said, "I'm going to have a boy, I was on the top."

The last lady started to cry.

The two other ladies asked, "Why are you crying?"

She replied, "I'm going to have puppies!!!"