It’s a bit of a carry over from other species. Many mammals give birth standing up, so the baby hits the ground. The impact is what triggers the baby to start breathing on its own.
I’ve seen a few videos where veterinarians will drop a newborn calf again if it didn’t get shocked enough to start breathing.
The same goes for humans. The slap is a stand in for getting dropped on the ground. It triggers the baby to start breathing.
Latest Answers