How do spermatogenesis and oogenesis compared

Multiplication is a stage, where spermatogonium and oogonium multiply by mitosis to form germ cells, i. Maturation is a phase where both the germ cells grow in size. Maturation takes place when germ cells undergo meiosis, after which they form spermatids and ootids that later undergo differentiation to produce male and female gametes, respectively.

Thanks ……, your content is really nice as you have described everything so clearly that anyone can understand, so again thank you. Your email address will not be published. Skip to content. Key Differences Between Spermatogenesis and Oogenesis Spermatogenesis is the production of sperms from spermatogonia in the seminiferous tubules of the testis in a male. Oogenesis is the production of the ovum from oogonia inside the ovary of a female. Spermatogenesis is a continuous process that occurs after the puberty till death, whereas oogenesis is a discontinuous process that occurs after the puberty till menopause.

All stages of spermatogenesis occur inside the testis of a male, whereas the stages of oogenesis occur inside the ovaries expect for the last stage occurs in the oviduct. In spermatogenesis, sperms release out from the testis, while oocytes release from the ovary that further develops in the process of oogenesis. Spermatogenesis results in four motile male gametes sperms from a spermatogonium and oogenesis results in a single non-motile female gamete ovum from an oogonium.

A secondary meiotic arrest occurs, this time at the metaphase II stage. At ovulation, this secondary oocyte will be released and travel toward the uterus through the oviduct. If the secondary oocyte is fertilized, the cell continues through the meiosis II, completing meiosis, producing a second polar body and a fertilized egg containing all 46 chromosomes of a human being, half of them coming from the sperm.

Spermatogenesis occurs in the wall of the seminiferous tubules, with stem cells at the periphery of the tube and the spermatozoa at the lumen of the tube. Immediately under the capsule of the tubule are diploid, undifferentiated cells.

These stem cells, called spermatogonia singular: spermatagonium , go through mitosis with one offspring going on to differentiate into a sperm cell, while the other gives rise to the next generation of sperm. Meiosis begins with a cell called a primary spermatocyte. At the end of the first meiotic division, a haploid cell is produced called a secondary spermatocyte. This haploid cell must go through another meiotic cell division.

The cell produced at the end of meiosis is called a spermatid. Four sperm result from each primary spermatocyte that goes through meiosis. Stem cells are deposited during gestation and are present at birth through the beginning of adolescence, but in an inactive state.

During adolescence, gonadotropic hormones from the anterior pituitary cause the activation of these cells and the production of viable sperm. This continues into old age. The fusion of these cells is called fertilization, and it results in the production of the zygote.

The zygote then proliferates, divides and differentiates into different tissues and organs of the body. All the information on these pathways of cell division and differentiation is encoded in the sperm and the egg.

Therefore it is important to study how these cells are formed and the differences in the processes underlying it. How Are Sperms Produced? Sperms are considered as the male gametes produced in the testis.

The process of sperm production in the male testis is called spermatogenesis. Sperms are produced from the mother cell called spermatogonium. These cells are present in small tubules of the male testis.

The spermatogonium is a diploid cell containing 2n chromosomes. The spermatogonium divides into four, haploid n spermatozoa. Spermatogonium arises from spermatogenic germs cells.

These germ cells are stem cells that have the capability of self-renewing. Differentiation of spermatogenic germ cells results in the formation of intermediate spermatogonium, which further undergoes mitosis to produce type B spermatogonia.

These type B spermatogonia further undergo mitosis to produce primary spermatocytes. The primary spermatocytes undergo meiosis I to produce secondary spermatocytes.

The secondary spermatocytes then undergo meiosis II and produce four haploid spermatids. These spermatids finally undergo spermiogenesis to produce the sperm tail. Spermatogenesis commences when the males attain puberty and continue for the rest of their lives. Millions of sperms are produced in the process every day. Spermatic development takes place about 70 days in humans. How Are Eggs Produced?

Eggs are produced in the ovary of females by a process called oogenesis. It is produced from the oogonia present in the ovary. The egg or the ovum is produced from the diploid primary oocyte by meiosis. Two polar bodies are also formed during meiosis I and II. Unlike spermatogenesis that occurs every day, oogenesis occurs once in a month, starting from puberty and ending at menopause. Similar to spermatogonia, the first female reproductive cell is the oogonia, which is a stem cell. Therefore oogonia have the ability of self-renewal and self-differentiation.

Thousands of oogonia divide into around seven million germ cells from the second to the seventh month of embryonic development. The oogonia divide by mitosis to produce the primary oocyte.

These primary oocytes undergo meiotic division till the diplotene stage in the embryonic stage, after which it stalls the process of cell division and attains a quiescent stage.

The cell division process is arrested until the girl attains puberty. Some primary oocytes have also been found. Most primary oocytes are destroyed, and around primary oocytes divide into gametes.