Search results

of gonad called an ovotestis. It is hard to find a common origin for gonads, but gonads most likely evolved independently several times. The gonads are...

copulation".[page needed] It is hard to find a common origin for gonads. However, gonads most likely evolved independently several times. At first, testes...

the developing gonads of an embryo. One type of gonadal dysgenesis is the development of functionless, fibrous tissue, termed streak gonads, instead of reproductive...

typically have normal vulvas, the person has underdeveloped gonads, fibrous tissue termed "streak gonads", and if left untreated, will not experience puberty...

spermatozoa. Spermatozoa are secreted by the male gonads (sexual glands) and other sexual organs of male or hermaphroditic animals and can fertilize the...

A testicle or testis (pl.: testes) is the male gonad in all bilaterians, including humans. It is homologous to the female ovary. The functions of the testicles...

bipotential gonad results from the collection of the medioventral region of the urogenital ridge. At the five-week point, the developing gonads break away...

birth, to patients with completely male or female gonads. Most individuals with this karyotype have apparently normal male genitalia, and a minority have...

differentiates into a tissue known as the gonadal ridge. The gonadal ridge produces the steroidogenic cells for both the gonads and the adrenal cortex. The adrenal...

Gonadal agenesis is a rare condition where an individual lacks both gonads. If the karyotype is 46,XY and the individual otherwise has a male phenotype...

they play major sex-related roles. Natural sex hormones are made by the gonads (ovaries or testicles), by adrenal glands, or by conversion from other sex...

spermatozoa of animals are produced through spermatogenesis inside the male gonads (testicles) via meiotic division. The initial spermatozoon process takes...

week of gestation. The gonads, in a bipotential state, may develop into either testes (the male gonads) or ovaries (the female gonads), depending on the consequent...

chromosome results in an XY combination, and a male child will develop. Genetic sex determines whether the gonads will be testes or ovaries. In the developing...

precursors of female (paramesonephric or Müllerian ducts) and male (mesonephric ducts or Wolffian) gonads. If a Y chromosome is lacking, or defective as seen in...

development of the gonads is part of the prenatal development of the reproductive system and ultimately forms the testicles in males and the ovaries in...

"Differentiation of female chicken primordial germ cells into spermatozoa in male gonads". Development, Growth and Differentiation. 39 (3): 267–71. doi:10.1046/j...

suggest one common primordium for the somatic cells of the female and male gonads in the region of abdominal segments 4 and 5" (PDF). Development. 115...

precursors in the gonads into Sertoli cells, the beginning of testes development. These initial Sertoli cells, in the center of the gonad, are hypothesized...

action, surgical, chemical, or otherwise, by which a male loses use of the testicles: the male gonad. Surgical castration is bilateral orchiectomy (excision...