If you have 3 eggs, the sperm are confused. They swim around and can't figure out which one to latch onto. They bounce from egg to egg, like balls in a pinball machine. They richocet from side to side without piercing one! They're lost---like a man who won't ask for directions (remember where they come from.)
But with ONE egg, there's no hesitation. They know exactly which way to go! They will have a direct route! A road map! They will latch one to that one egg---and do their job! Bingo! One egg---one baby for you!