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  2. Development of the gonads - Wikipedia

    en.wikipedia.org/wiki/Development_of_the_gonads

    The first appearance of the gonad is essentially the same in the two sexes, and consists in a thickening of the mesothelial layer of the peritoneum. The thick plate of epithelium extends deeply, pushing before it the mesoderm and forming a distinct projection. This is termed the gonadal ridge. The gonadal ridge, in turn, develops into a gonad.

  3. Development of the endocrine system - Wikipedia

    en.wikipedia.org/wiki/Development_of_the...

    The reproductive system begins development at four to five weeks of gestation with germ cell migration. The bipotential gonad results from the collection of the medioventral region of the urogenital ridge. At the five-week point, the developing gonads break away from the adrenal primordium. Gonadal differentiation begins 42 days following ...

  4. Gonad - Wikipedia

    en.wikipedia.org/wiki/Gonad

    A gonad, sex gland, or reproductive gland [1] is a mixed gland and sex organ that produces the gametes and sex hormones of an organism. Female reproductive cells are egg cells, and male reproductive cells are sperm. [2] The male gonad, the testicle, produces sperm in the form of spermatozoa. The female gonad, the ovary, produces egg cells

  5. Genital ridge - Wikipedia

    en.wikipedia.org/wiki/Genital_ridge

    In embryology, the genital ridge (genital fold or gonadal ridge) is the developmental precursor to the gonads. The genital ridge initially consists mainly of mesenchyme and cells of underlying mesonephric origin. Once oogonia [clarification needed] enter this area they attempt to associate with these somatic cells.

  6. Sexual differentiation in humans - Wikipedia

    en.wikipedia.org/wiki/Sexual_differentiation_in...

    Gonadal sex refers to the gonads, that is the testicles or ovaries, depending on which genes are expressed. Phenotypic sex refers to the structures of the external and internal genitalia. [6] Six weeks elapse after fertilization before the first signs of sex differentiation can be observed in human embryos. [5]

  7. Development of the human body - Wikipedia

    en.wikipedia.org/wiki/Development_of_the_human_body

    It is initiated by hormonal signals from the brain to the gonads: the ovaries in a girl, the testicles in a boy. In response to the signals, the gonads produce hormones that stimulate libido and the growth, function, and transformation of the brain, bones, muscle, blood, skin, hair, breasts, and sex organs.

  8. Could This Overlooked Organ Hold The Key To Living Longer?

    www.aol.com/could-overlooked-organ-hold-key...

    A Brief Biology Breakdown. Here’s what scientists do know: The ovaries are oblong glands each about the size of a kiwi. They’re responsible for the production and secretion of at least two ...

  9. Development of the reproductive system - Wikipedia

    en.wikipedia.org/wiki/Development_of_the...

    The development of the reproductive system is the part of embryonic growth that results in the sex organs and contributes to sexual differentiation.Due to its large overlap with development of the urinary system, the two systems are typically described together as the genitourinary system.