When I started researching cloth diapers while pregnant with Michael I found references to EC or elimination communication, also known as infant potty learning and infant hygiene.
I wasn't sure what it was and really wasn't that interested until Michael was about 3 months old. What I discovered is this, EC is NOT train your child to the potty as an infant.
EC is the understanding that babies are born knowing how to control their sphincter muscles and can hold their pee and poop for a short time. Babies are born with the instinct to NOT pee or poop all over themselves. They try to communicate their need to pee and poop, and depend on us to take them to the appropriate place to relieve themselves.
By putting our babies in diapers we train them over months to ignore their bodies signal of the need to pee or poop and just go, then months later try to reverse the processes and retrain them to do what they were born able to do.
In some countries this is the only way to potty and infant, only the super rich have diapers, and some of them have nannies to potty their children for them.
There are several books out there if you want to know more.
The Diaper-Free Baby: The Natural Toilet Training Alternative By Christine Gross-Loh
Infant Potty Training: A Gentle and Primeval Method Adapted to Modern Living By Laurie Boucke
and a blog The Diaper Free baby