Welcome to the The Incredible Edible Egg™ Eggcyclopedia, where you can access the latest egg information from A-Z. The Eggcyclopedia was developed by the American Egg Board (AEB) on behalf of America's egg farmers who are committed to caring for their hens and producing high-quality eggs for you and your families.

Just click on any letter below to bring up a list of egg terms and their related definitions.


Choline is essential for the normal functioning of all cells in your body and assures the structural development and signaling functions of cell membranes. Choline is made by your body but needed in larger amounts during pregnancy and lactation. When consumed during pregnancy, choline may be a key factor in the development of infants’ memory functions and, later in life, choline may improve memory capacity. Animal studies have shown that a mother’s insufficient choline production and intake during pregnancy can cause either defective memory or lower memory capabilities that last throughout life. Research shows that choline supplementation during fetal development enhances memory function. Egg yolks are an important source of choline (126 mg per large egg yolk) and provide 28% of a pregnant woman’s daily needs (450 mg).