Egg forming cells (oöcytes) go through two divisions
1º = primary
2º = secondary
Starts with a 2n=46 1ºoöcyte that divides, resulting in two n=23 cells, but one is a large 2º oöcyte and one is a small 1st polar body that may itself divide
Second division only occurs if 2º oöcyte is fertilized. Results in one large n=23 ovum (egg) and one small n=23 2nd polar body
Thus oögenesis results in one large fertilized egg (zygote) and possibly three small polar bodies