Red or brown spots in chicken eggs: A sign of spoilage?

Red or brown spots inside a chicken egg are typically harmless and result from natural physiological processes during the egg's formation. Such inclusions do not indicate product spoilage, disease in the bird, or fertilization. Causes of Red Spots These specks appear when a microscopic blood vessel ruptures in the hen's reproductive system as the egg moves through the oviduct. This is a common occurrence and does not signal hormonal imbalances or other pathologies. "The appearance of blood in an egg is not a pathology, but the result of a natural micro-damage to a vessel," therapist Anna Kuznetsova told Pravda.Ru. "If the egg is fresh and has no foreign odors, such a spot poses no threat to human health."