What are the odds of a 4 yolk egg?

The odds of finding a four-yolk egg are extremely rare, with estimates suggesting they occur in about 1 in 1,000 to 1 in 2,000 eggs. Factors contributing to the occurrence include the age of the hen, breed, and certain reproductive anomalies. While two-yolk eggs are more common, four-yolk eggs are considered a novelty and often attract attention due to their rarity.