During the 1960s, it was common for a doctor to inform a couple of their pregnancy status, by having a magician pull a rabbit out of a hat. If rabbit was alive, no pregnancy, a dead rabbit meant pregnancy.
Thatโ€™s why when you go to a magic show, sometimes you may hear some guy in the audience yell: โ€œThank god, youโ€™re not pregnant!โ€
Another Fun Fact from Mr. Science.