So the eggs are already formed before fertilization? I guess that makes sense, it's just hard for me to picture. How long can they store the sperm and keep it viable? It seems like they would wait until after ovulating to breed.
All female animals technically form eggs before fertilization, because its a sperm that fertilizes an egg. Thats why you can get infertile eggs, they just never met the right sperm! All those poor eggs at the supermarket.....