Olympic Medal Winners That Were WHAT??: Cranium Kruncher

Winning an Olympic medal is no easy feat. But at least three athletes in history won medals while having this one thing in common. What is it?

Cornelia Pfohl of Germany, Juno Stover-Irwin of the U.S., and Anky van Gunsven of the Netherlands were all Olympic medal winners who were pregnant when they won their medals.
Cornelia was an archer, Juno a diver, and Anky an equestrian.