Don’t worry it’s just a plastic one. I just saw this exhibit in L.A. I think I remember seeing this
baby fetus. One of the coolest parts about the exhibit was the display of babies fetuses in different stages of gestation. It was amazing how developed and human the baby fetus looked even at 24 weeks. The exhibit did make clear that all the plasticised babies fetuses had died natural deaths (as opposed to human choice, I assume).
The whole exhibit was amazing, so if you ever get an opportunity to see Body Worlds, you should go. Just don’t let your imagination run rampant while you’re there.