When can babies start eating eggs?

My doctor told me to start egg yolks little by little from 8 months until baby can take a full yolk then after 9 months, start on the whites little by little until baby can eat all the whites then start mixing both until baby can eat one full egg. When starting to introduced, they recommended giving full boiled eggs until they can eat one full egg then start to cook it in different ways. You can mix the boiled egg into their porridge or puree.