Oogenesis

What is oogenesis

the process of forming female gametes (eggs)

what step of oogenesis happens before birth

oogonia stem cells will complete mitosis during fetal development resulting in primary oocytes (diploid, 2n). A few of the primary oocytes will enter prophase I shortly prior to birth but the development of all ova will arrest until after puberty

what will happen to the majority of the primary oocytes

many will begin to degenerate in a process called atresia

describe the step of oogenesis that happen as puberty commences

the primary oocytes will continue through meiosis I as the follicle develops into the secondary oocyte

how is the meiosis in oogenesis during puberty different than that of spermatogenesis

instead of having 2 daughter secondary oocytes after meiosis I like in spermatogenesis we end up with only one daughter cell and a much smaller polar body due to unequal cytoplasmic distribution

what eventually happens to the secondary ooctye

will be what is eventually ovulated and taken up by the uterine tube

what happens to the secondary oocyte once its fertilized

proceeds through meiosis II giving off second polar body and a final daughter cell. resulting cell is a fully diploid fertilized zygote