KNOWING THE PROCESS OF SPERM AND OVUM CELL DEVELOPMENT IN HUMANS The reproductive system is one of the organ systems that is very vital in this case as the reproduction of living things. In the male reproductive system will produce reproductive cells in the form of: Sperm Cell, whereas in women will produce reproductive cells in the form of Ovum Cell or often also called Egg. Maybe you already understand the difference.

The development of reproductive cells begins in adolescence. During adolescence, hormones begin to function, including reproductive hormones. There are many changes experienced by a teenager in terms of their reproductive system, such as starting to grow breasts in teenage girls and starting to develop penis in teenage boys. In addition, it is also marked by the growth of pubic hair in the genital area.

The development of hormones in adolescence also encourages the development of reproductive cells in the adolescent’s body itself. In adolescent girls is marked by Menstruation and in adolescent boys is marked by Wet Dreams. Hayoo.. Who has experienced it!

Then, how does the development of reproductive cells in humans? Let’s discuss HOW DO SPERM AND OVUM CELLS DEVELOP IN HUMANS?.


Sperm Cells or scientifically called Spermatozoa produced by the testes. In its formation, sperm cells will undergo a process called Spermatogenesis. Process Spermatogenesis it will take 2-3 weeks to become Spermatozoa or the perfect Sperm Cell. The testes will continue to produce sperm cells from adolescence to old age.


The process of Spermatogenesis starts from several stages, namely Multiplication, Spermatogonia, Maturation, and Differentiation (Spermiogenesis).

  1. Copy Process Spermatogonia. Spermatogonia produced by the testes, in the testes contains 100 million Spermatogonia and and can produce 200 million sperm cells every day. Spermatogonia will divide into mitosis to produce Spermatogonianew and will develop again into Spermatocytes I (Primary Spermatocytes)
  2. Maturation Process. After becoming Spermatocytes I (Primary Spermatocytes) will then divide again by Meiosis I which will last for 3 weeks and will produceSpermatocytes II or Secondary Spermatocytes. At the end of meiosis II, Spermatocytes II will be Spermatids. Cell Spermatids it is compact and small. Cell Spermatids it already contains the X and Y chromosomes.
  3. Differentiation Process (Spermiogenesis). In this process Spermatids will lose their intercellular cytoplasm and will turn into Spermatozoa. This formation is the formation of the achromosome and the formation of the tail in the sperm cell. Achromosomes are modifications between Golgi bodies and lysosomes that contain enzymes Hyaluronidase which can penetrate the egg cell membrane. The tail on the sperm cell will function in the movement of the sperm cell.

THE PROCESS OF ejaculation in men

Spermatozoa or sperm cells will have a length of about 50-60 microns and each ejaculation will contain sperm cells of about 180 million sperm cells per milliliter. Sperm cells will come out of the testes to the epididymis. In the epididymis sperm cells will be accommodated and matured. When an orgasm will occur, the muscles around the epididymis will contract and Spermatozoa drains into the vas deferens.

After arriving at the vas deferens, Spermatozoa will lead to a cement bag (Vesica Seminal), and will penetrate the prostate gland. In the prostate gland, Spermatozoa will mix in the prostate fluid, such as Precum or Cowper’s Fluid (secreted by the Bulbouletral Gland) and will produce a fluid called Semen. The function of this fluid is to neutralize acid in the bladder and vagina. After the process in the prostate gland Spermatozoa will empties into the urinary tract (ureters) and will radiate through the penis.

At the time of ejaculation, the muscles in the bladder will contract so that semen will not enter the bladder and when urinating will not coincide with ejaculation. At the time of ejaculation the muscles in the penis will widen because a lot of blood will enter the penis muscles, this is called an erection. At the time of ejaculation the muscles in the penis will get bigger until ejaculation occurs.


In contrast to the development of sperm (Spermatogenesis) which continues to be produced during life, ovum development or Oogenesis not produced during life. The period of development of ovum cells ranges from 33-41 years or occurs at the age of 12 to 63 years. According to research, the number of eggs in children aged 7 years is about 300,000 pieces and will decrease during the reproductive period. Ovum cells released during the reproductive period are about 400-500 eggs. Ovum or egg cells will continue to be ovulated during menstruation.


Oogenesis occurs in the ovaries. Inside the ovary there are many oogonia cells which are the material of the egg cell. Oogonium will divide by mitosis to form a new oogonia. The oogonia will then develop into the Primary Oocyte. The primary oocyte then divides by meiosis into the secondary oocyte and the first polar body. This Secondary Oocyte is larger than the First Polar Body and has an egg yolk and cytoplasm.

The secondary oocyte then divides by meiosis into the ootid and the second polar body. This ootid has the same size after this meiotic division. This ootid then develops into an Egg Cell or Ovum Cell. While the remaining Polar Body Cells will be reabsorbed.

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