These are one of the funniest kind of jokes because the Medical profession is otherwise a serious profession.
A very popular girl went to her doctor and found out that she was pregnant.

The doctor says, "I know that you are not married!

Do you know who the father of this baby is?"

The girl thought and then asked, "Doc, if you ate a can of 'Baked Beans', would you know exactly which bean made you fart?"