Re: why are there double yolked eggs? when fertilized do you get twins?

Generally double yolk (or even triple yolk) eggs are laid by young chickens 
when they first come into production. Most commercial eggs are not fertile, 
but if they were to be fertile, the presence of the two yolks would 
generally lead to an unsuccessful hatch. The nutritional value of the egg 
white, which is an important food supply for the embryo is insufficient for 
the two embyros.