One thing that was shocking is when a cat would eat their placenta after giving birth to a kitten. I was surprised to learn that the when eating the placenta, a chemical is released back into their body that acts as a numbing agent. This can make the birth of the kittens will be less painful. When a human gives birth, we tend to load up on medication to make the process less painful. The fact that cats figured out a way to medicate themselves during labor is incredible. This can make the birth of the kittens will be less painful.