And the secondary follicle is much larger because it contains much more fluid, it contains many more cells and it also contains the secondary Oocide. So the primary follicle contains the primary Oocide which is a diploid cell. And then we have the secondary follicle that contains the secondary Oocide which is a haploid cell. So primary Oocide undergoes meiosis one to produce the secondary Oocide as well as another cell known as a polar body. And this is the first polar body that is formed. Now, the secondary Oocide contains the majority of the cytoplasm that came from the primary Oocide but the polar body only obtained a very small amount of that cytoplasm.