What is the ovum doing during the primary oocyte stageSoluti

What is the ovum doing during the primary oocyte stage?

Solution

Answer:

Primary oocytes forms prenatally and remain suspended in prophase of meiosis I until it reaches puberty. An oocyte completes meiosis I as its follicle matures resulting in a secondary oocyte and the first polar body. After ovulation, each oocyte continues to meiosis II metaphase. Meiosis II is completed only if fertilization occurs. This results in a fertilized mature ovum and the second polar body.

Thus, the human female oocyte is arrested in metaphase II until fertilization by a sperm takes place.