Meiotic division during oogenesis is different from that in spermatogenesis. Explain how and why ?

Spermatogenesis	Oogenesis
$(1)$ The process of formation of sperms occur in mature age	$(1) $ Oogonia are formed before birth.
$(2)$ Sperms are produced in lakhs of amount at a time.	$(2)$ Each month at a time only one ovum is produced.
$(3)$ After two complete meiotic division four cells are produced of similar type and size.	$(3)$ Pre phase $-1$ During this meiosis $1$ is prevented and in large cell with cytoplasm and there small cells are produced.
$ (4)$ They mature into flagellated and motil cell.	$(4)$ Mature ovum is nonflagellated and nonmotile.

It makes ovum larger than the remaining three polar bodies by unequal mitotic division because there are many organelles and cytoplasm in ovum. It has many chances for rescue.

Male produces sperms in lakhs of amount while female produces only one ovum in each month and it waits for time before fertilisation for second meiotic division.

Sperm is small and motile because it has to move from male reproductive system to female reproductive system. There is abundant stored food in large ovum so it develops immediately after fertilisation.