Difference Between Spermatogenesis and Oogenesis

Spermatogenesis and oogenesis are the two types of reproductive cell formation processes. Spermatogenesis is the process in which the spermatozoa (male gametes) are formed from spermatogonia, whereas oogenesis is the process of the formation of the female gamete, the ova, or egg cells.

Spermatogenesis takes place in the testes of males, whereas oogenesis takes place in the ovaries of females. Spermatogenesis is initiated when the male reaches puberty, whereas oogenesis begins in the fetus. Spermatogenesis produces four haploid cells (the mature spermatozoa) from a single diploid spermatogonium (primary spermatocyte), while oogenesis produces one haploid ovum from a single diploid oocyte.

In spermatogenesis, the cells divide by meiosis, while in oogenesis, the cells divide by meiosis and a process called oogonial proliferation. Spermatogenesis occurs continuously throughout a man’s life, while oogenesis occurs in intervals during a woman’s life.

In spermatogenesis, the cells divide by mitosis and form spermatids, which later develop into spermatozoa. In oogenesis, the cells divide by meiosis and the first polar body is formed. The remaining cell becomes an oocyte, which later develops into an ovum.

Spermatogenesis v/s Oogenesis

The process of formation of male gametes or sperms from the sperm mother cell is called spermatogenesis while the process of formation of female gamete or egg from the egg mother cell is called oogenesis.

S.No.	Spermatogenesis	Oogenesis
1.	The process of formation of male gametes or sperms from the sperm mother cell is called spermatogenesis.	The process of formation of a female gamete or egg from an egg mother cell is called oogenesis.
2.	It takes place in the testes.	It takes place in the ovary.
3.	The sperms are long and tailed.	The eggs are spherical.
4.	Sperms are motile.	The eggs are non-motile.
5.	From one sperm mother cell, four sperms are formed and all are functional	From one mother egg cell, four daughter cells are formed, out of which only one acts as an ovum.