The reason is safety. The Journal of Nature Ecology and Evolution did a study and found that having your baby on the left side is the best place to protect them.

Image Credit: Flickr / Mel Schmidt
The right side of the human brain controls the left side of the body. Not only that, but the right side of the brain regulates how you deal with people – your emotional intelligence.

Image Credit: Flickr / Michael Bentley
So, with your baby on your left side, the right side of your brain is in control and aware of what your baby is feeling. Having your baby on your left allows you to react more quickly to them.

Image Credit: Flickr / Kristi Hayes-Devlin
You can also bond more efficiently with them on your left too – because you are able to respond to their needs faster. Isn’t science awesome?! Share away, people!