In primates, we often think of the oocyte as an egg, however most eggs are much more than just the single haploid cell.

In primates, we often think of the oocyte as an egg, however most eggs are much more than just the single haploid cell. Beginning with fish eggs and progressing through amphibians, reptiles, birds, and all three general taxa of mammals, describe the egg developments introduced in each taxa and how they benefit reproductive success