How early can you potty train
Some people begin potty training straight from birth! It's called elimination communication and I have heard that it can be very successful. You start putting your baby over the toilet whenever they show signs of going to the bathroom starting from as early as the day they are born. Many people also start teaching their babies sign language, and by around 4-6 months, the child is able to sign that they need to go to the bathroom.
Personally, elimination communication isn't for me. I'm OK with changing diapers for a few years and can't imagine how much stress it would be to try and catch all of those newborn baby poos!