QUESTION: Is it good luck to get a double yolk in an egg?

ANSWER: Double-yolked eggs are believed to be a sign of good luck. However, in some parts of Great Britain a double-yolked egg is a warning of death. ... Finding a double yolk in an egg means someone in the immediate family is pregnant. If she already knows she is pregnant, it means she will have twins.

Chances of finding a double-yolked egg are about one in 1,000.

I just love old family folklore!