Spermatogenesis vs. Oogenesis

The formation of gametes is carried out by a process called gametogenesis. Gametogenesis is of two types, spermatogenesis and oogenesis. The main difference between spermatogenesis and oogenesis is the process of formation of male gamete which is sperm is called spermatogenesis, which occurs in seminiferous tubules. And the process of formation of female gamete which is ovum, is called oogenesis. Oogenesis occur in ovaries.

What are Spermatogenesis?

The formation of male gametes takes please on this process, in the seminiferous tubules of the testis. In this process, a primary spermatocyte divides into two secondary spermatocyte. After this a secondary spermatocyte divides to form two spermatids. During this process, no polar body is formed. This process is completed in testes and then once it’s done, mature sperms are released from the testes. Now, these spermatids are transformed to sperms in order to carry out the reproduction, by the process called spermiogenesis. This process is completed in 74 days altogether.


What are Oogenesis?

Oogenesis is the formation of female gametes called ovum, which takes place in ovaries. Multiplication, growth and maturation are the three phases of this process. In this process, a primary oocyte divides to form a secondary oocyte with the formation of one polar body. Secondary oocyte then divides to form an ovum and one polar body again. This process is carried out in female reproductive tracts and then oocyte is released from the ovaries. Then after this, they mature outside ovaries when and if the process of fertilization takes, please.


Key Differences between Spermatogenesis and Oogenesis

  1. Process of formation of sperms is called spermatogenesis and the process of formation of ovum is called oogenesis.
  2. Spermatogenesis takes place in the testes and oogenesis takes place in the ovaries.
  3. No polar bodies are formed in spermatogenesis. Two polar bodies are formed in oogenesis.
  4. Spermatogenesis takes 74 days to complete while oogenesis takes days to years.
  5. All stages of spermatogenesis are completed inside the testis while some processes of oogenesis is carried out outside ovaries.
  6. The growth phase is short in spermatogenesis but long in oogenesis.
  7. Spermatogenesis form motile make gametes but oogenesis form non-motile gametes.

Video Explanation

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