← Chapter 27
Anatomy & Physiology · Chapter 27

Oogenesis

Egg making uses meiosis too, but with a twist. The divisions are unequal. So one cell keeps almost everything and becomes the egg. Step through it.

Oogonium

Oogenesisone egg, not four

The stages

Compared with sperm: here meiosis is unequal. It makes 1 large egg + up to 3 tiny polar bodies, which die. Putting all the supplies into one egg gives it the best chance to feed an embryo.
📷 Reference image
A real labeled figure to compare with the interactive above.
Oogenesis reference figure
Oogenesis — labeled reference figure