testes

A gene's first 'kiss' sets off that affair known as puberty

... turn, these rising levels of LH and FSH cause the testes and ovaries to produce the sex hormones testosterone and estradiol, the culprits responsible for the physical changes and emotional baggage of male and female puberty, respectively. "We now have very good evidence that the GPR54 gene and its switch,...

How the environment could be damaging men's reproductive health

...nt of male foetuses. Babies born with undescended testes are at higher risk of developing testicular cancer...ter. Sixty-nine (5.7%) of the boys had one or both testes undescended. After one year the testes had descended fully in 51 of the 68 children (75%) who were f...

Most common lung cancers may begin in newly discovered cells

...ed reports of stem cells found in the skin, brain, testes and gut. The lab has already teamed up with another research group to develop microscopic fluorescent probes to image the unique molecular surface of BASCs and track the progress of the naturally arising tumor, Jacks said. The similar genetic activi...

Sudden change in social status triggers genetic response in male fish, study finds

...ostentatious colors and stripes disappear, and the testes shrink and the male becomes infertile. "Previously we did an experiment in which we moved the subordinate male out of the tank and put him in a situation where he could rise and become dominant," Fernald says. "Because he was in a new situation,...

Sperm stem cells closer to being like embryonic stem cells

...ntify when mixed with other cell types. "The rat testes contain other cells types in addition to stem cells," Dr. Hamra said. "If these other cells are included in the culture, they produce chemicals that block the ability of the stem cells to remain stem cells. We're still trying to figure out why. But t...

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testes at Biology Technology

RT-PCR Primers for the Study of Apoptosis

... a spliced version of Fas antigen found in testes or an artifact. Again, the amplification of the rat Fas antigen gene is specific. No band appeared on the control lanes with mouse and human cDNA libraries. Figure 5 Conclusions Apoptosis is one ...

testes at Biology Definition

Spermatogenesis

...rm cells, which occurs in the male gonads or testes . Sperm cells develop initially from germ stem ce...ozoa are produced in seminiferous tubules in the testes . They start off as spermatogonia , undergoing mitosis becoming a type A spermatogonium or a type ...

Sperm

... are produced in the seminiferous tubules of the testes in a process called spermatogenesis. Round cells called spermatogonia divide and differentiate eventually to become sperm. During sexual intercourse the sperm is deposited in the vagina - and then it moves to the ovum inside the ovary. See also...

Semen

...matozoa (or 'sperm', for short), produced in the testes , are released per ejaculation. However, they make up only about 2–5% of the volume of semen. The bulk of the semen is composed of seminal plasma, the fluid portion of semen.This fluid is contributed by the accessory male reproductive organs . ...

Klinefelter's syndrome

...proportions, sparse facial and body hair , small testes , and an inability to produce sperm . Most XXY males have some degree of language impairment as well. The syndrome is associated with an increased risk of breast cancer , pulmonary disease , varicose veins , and osteoporosis . The condition was...

testes at Biology Dictionary

Y chromosome

... the indeterminate gonads toward development as testes . See testis-determining factor. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ... Full article >>> Sex chromosomes : The X and Y chromosomes in human beings that determine the sex of an individual. Females have two X chrom...

Vas deferens

...atory duct and urethra . The tube connecting the testes with the urethra . Full article >>>..., in 30-40 minutes Testosterone secretion by the testes is not inhibited. Full article >>> androgenic gland Gland located near the vas defe...

Testes

... by the scrotum , a pouch of skin that keeps the testes close or far from the body at an optimal temperat...dit] See also ... Full article >>> testes : endocrine glands that secrete androgens ; the male reproductive organ s located in the scrotu...

Tendon

...tissue by which muscle s are attached to bones. testes : endocrine glands that secrete androgens ; the male reproductive organ s located in the scrotum . thalamus : a portion of the forebrain that integrates sensory impulses. Full article >>> tendon A bunch of parallel collagen...

Tendons

...tissue by which muscle s are attached to bones. testes : endocrine glands that secrete androgens ; the male reproductive organ s located in the scrotum . thalamus : a portion of the forebrain that integrates sensory impulses. Full article >>> Muscle s and tendons The movements o...

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testes at Medicine News

Male infertility in relation to pesticide

...seen. "Our results suggests toxicants act on the testes and post-testicular sites, including the accessory sex glands," said study author Dr Luc Multigner, from France's Institut National de la Santé et de la Recherche Médicale. The findings are released today in the journal Human Reproduction. Environme...

Male contraceptive in trial

...ital in UK says the technique works by putting the testes to rest, while ensuring the male libido and male characteristics remain intact.// Professor Chater says he is confident the injections will not impair long-term fertility.Trial participants will receive the injections for up to 18 months, with the t...

A new contraceptive

...Futhermore, the only place it turned up within the testes was in sperm. And within sperm, it is found only in the principal piece of the tail." It is also specific to mature sperm and does not appear to be expressed in sperm precursor cells, or in immature sperm.The very specific role of the protein means t...

Carboplatin Drug Is More Effective Than Radiation Therapy For Testicular Cancer

...o less than this level. This is the reason why the testes are located outside the body. For more information more: http://www.medindia.net/patients/ paediatrics/Undescended.asp Know about male reproductive system and testis: The male reproductive system of a man consists of a pair of testes, ducts, ac...

Limiting sperm motility for contraception

...tion channel of sperm” - was expressed only in the testes and not in any other tissue.To begin to define the role of CatSper in sperm function, the researchers knocked out the gene in mice. They found that, although the mice were normal in every other respect, and that female mice were fertile, the male mi...

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testes at Medicine Products

3rd Generation Estradiol RIA Test

...en, small amounts of estradiol are produced in the testes and from peripheral conversion of androgens. The biological actions of estradiol include stimulation of linear bone growth, acceleration of epiphyseal closure, stimulation of mammary development, and maturation of the vaginal mucosa and uterine endom...

Estradiol EIA Test

...en, small amounts of estradiol are produced in the testes and from peripheral conversion of androgens. The biological actions of estradiol include stimulation of linear bone growth, acceleration of epiphyseal closure, stimulation of mammary development, and maturation of the vaginal mucosa and uterine endom...

Estradiol RIA Test

...en, small amounts of estradiol are produced in the testes and from peripheral conversion of androgens. The biological actions of estradiol include stimulation of linear bone growth, acceleration of epiphyseal closure, stimulation of mammary development, and maturation of the vaginal mucosa and uterine endom...

Estradiol, Ultra-Sensitive RIA Test

...en, small amounts of estradiol are produced in the testes and from peripheral conversion of androgens. The biological actions of estradiol include stimulation of linear bone growth, acceleration of epiphyseal closure, stimulation of mammary development, and maturation of the vaginal mucosa and uterine endom...

Testosterone EIA Test

...l males, testosterone is secreted primarily by the testes with only a small amount derived from peripheral conversion of androstenedione [2]. In adult women, it has been estimated that over 50% of serum testosterone is derived from peripheral conversion of androstenedione secreted by the adrenal and ovary, ...

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testes at Medicine Technology

Peer Reviewed Journal Article Indicates Repros' Proellex Exhibits Potential for New Approach to the Treatment and Prevention of Breast Cancer

...ed to restorenormal testosterone production by the testes and has recentlycompleted a six-month U.S. non-pivotal Phase 3 clinical trial forthe treatment of testosterone deficiency in men due to secondaryhypogonadism. According to industry sources, approximately 13million men in the United States experience ...

Repros Reports That Proellex Has Demonstrated Superior Efficacy and Safety in Endometriosis When Compared to Standard of Drug Care

...ed to restorenormal testosterone production by the testes in men and hasrecently completed a six-month U.S. non-pivotal Phase 3 clinicaltrial for the treatment of testosterone deficiency due to secondaryhypogonadism. According to industry sources, approximately 13million men in the United States experience ...

Repros' Androxal Shows Highly Statistically Significant Positive Effects in Men with Secondary Hypogonadism

...ed to restore normaltestosterone production by the testes and has completed a six monthU.S. Phase 3 clinical trial for the treatment of testosteronedeficiency in men due to secondary hypogonadism. According toindustry sources, approximately 13 million men in the United Statesexperience testosterone deficien...

Repros' Proellex Shows Statistically Significant Improvement in Primary Endpoint in Phase 2 Trial in the Treatment of Uterine Fibroids

...ed to restore normal testosterone productionby the testes and is being tested in a non-pivotal U.S. Phase 3clinical trial for the treatment of testosterone deficiency in mendue to secondary hypogonadism. For more information, please visit the Company's website athttp://www.reprosrx.com. Any statements tha...

testes at Medicine Dictionary

Vas deferens

...as deferens , or vas) that carry sperm from the testes to the penis are cut and blocked. A few months after the vasectomy , the semen (the fluid that is ejaculated during sex) no longer contains sperm . Full article >>> Obstruction of the ejaculatory ducts can be diagnose d by ult...

Vagina

...his balloon runs along a structure in both of the testes called the sperm atic cord and opens into the abdomen . Full article >>> vagina (vah-JYE-na) The muscular canal extending from the uterus to the exterior of the body. Also called the birth canal. vagina l ... Full article &#...

Urogenital

...genital system ( bladder , kidney , prostate , testes ) may be affected. Full article >>> It is caused by a single-celled protozoan parasite called Trichomonas vagina lis. Trichomoniasis is primarily an infection of the urogenital tract; the urethra is the most common site of ...

Testosterone

...th, and sexual development. It is produced by the testes and in very small amounts by the ovaries. Full article >>> Testosterone Replacement. One very small and short term study investigated the effects of testosterone replacement on depression and other nonmotor symptoms in PD patien...

Testicular self

...ion (TSE) A simple manual self-examination of the testes . Thoracentesis ( Pleura l tap) A procedure to remove fluids from the area between the two layers ( pleura ) covering the lung. Full article >>> Because testicular cancer is fairly uncommon, even in patients who had an undescended...

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