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Latest Male reproductive system Stories

2009-12-15 14:05:00

Reproductive researchers from the University of Pennsylvania and The Children's Hospital of Philadelphia have succeeded in isolating and transplanting pure populations of the immature cells that enable male reproduction in two species"”human spermatogonia and mouse gonocytes. These germline stem cells, taken from testis biopsies, demonstrated viability following transplantation to mouse testes within a controlled laboratory setting. The results indicate remarkable similarity between the...

2009-11-24 15:54:47

The decreased risk of HIV infection in circumcised men cannot be explained by a reduction in sores from conditions such as herpes, according to research published in PLoS Medicine. In further analyses of data from 2 clinical trials including more than 5,000 men in rural Uganda, which had shown that circumcision reduced the risk of HIV infection in men by about 60%, Ron Gray of the Johns Hopkins Bloomberg School of Public Health and colleagues investigated factors associated with that...

2009-11-03 14:00:15

The sexual function of male rodents can be impaired by in utero and/or neonatal exposure to external molecules that disrupt normal hormone functioning, giving rise to concerns that low-level exposure to such molecules might cause similar effects in humans. Examples of such molecules include the synthetic nonsteroidal estrogen DES, which was used as a treatment for various diseases until the mid 1990s, and BPA, which is found, among other places, in some plastic containers. New research, by...

2009-10-19 07:15:00

ISSUES OPEN LETTER CALLING ON ATTENDEES AT AMERICAN ACADEMY OF PEDIATRICS MEETING TO REJECT CALL TO RECOMMEND IN FAVOR OF CIRCUMCISION FOR FIRST TIME UNNECESSARY, RISKY SURGERY FAILS TESTS OF MEDICAL ETHICS AND HUMAN RIGHTS WASHINGTON, Oct. 19 /PRNewswire-USNewswire/ -- Leaders of Intact America (www.intactamerica.org) today issued a call to conscience to doctors at the annual meeting of the American Academy of Pediatrics, urging them to say no to neonatal male circumcision....

2009-09-16 06:56:37

Findings may lead to development of novel approach for male contraception Virginia Commonwealth University School of Medicine researchers have discovered a gene involved with the production of sperm that may contribute to male infertility and lead to new approaches to male contraception. One in six couples trying to conceive a baby is affected by infertility, according to the American Fertility Association "“ and in about half of these cases, a male factor is present. Sperm defects are...

2009-08-18 15:58:00

GPx5, an antioxidant protein that protects immature spermatozoa once they have left the testicle, has been identified by the GReD Unit (1) (CNRS / INSERM / Universities de Clermont-Ferrand).  This discovery by Joël Drevet and his team establishes a link between post-testicular oxidative stress and degradation of the DNA in male gametes.  These findings, which presage a major clinical impact "“ particularly in the context of medically-assisted procreation...

2009-08-06 13:36:25

The promise of stem cell therapy may lie in uncovering how adult cells revert back into a primordial, stem cell state, whose fate is yet to be determined. Now, cell scientists at the Johns Hopkins University School of Medicine have identified key molecular players responsible for this reversion in fruit fly sperm cells. Reporting online this week in Cell Stem Cell, researchers show that two proteins are responsible redirecting cells on the way to becoming sperm back to stem cells."We knew...

2009-07-30 22:18:01

A U.S. expert on urological conditions advises parents to take action if their son complains of testicular pain. Sandra Vassos of the American Urological Association Foundation says if the testicular pain is sudden and severe and there is swelling on one side, the boy may have testicular torsion and should be taken to an emergency room. Testicular torsion is very rare, but can be serious if not treated promptly, Vassos says. The condition occurs when the spermatic cord -- a cord by which a...

2009-07-09 09:34:32

Attractive males release fewer sperm per mating to maximize their chances of producing offspring across a range of females, according to a new paper on the evolution of ejaculation strategies. The findings by researchers at UCL (University College London) and the University of Oxford suggest that, paradoxically, matings with attractive males may be less fertile than those with unattractive ones.In a paper to be published in the journal American Naturalist, the team mathematically modeled a...

2009-06-25 11:45:00

REMOVAL OF HEALTHY FUNCTIONING TISSUE VIOLATES MEDICAL ETHICS, HUMAN RIGHTS OF BABY BOYS WHO CANNOT GIVE INFORMED CONSENT NEW YORK, June 25 /PRNewswire-USNewswire/ -- Parents, pediatricians and health and human rights activists today announced the launch of INTACT AMERICA and its website -- www.intactamerica.org -- to change how America thinks about male circumcision. The national campaign argues that painful and medically unnecessary surgery to remove healthy genital tissue from...


Latest Male reproductive system Reference Libraries

Prostate
2013-03-04 15:21:55

The male prostate gland acts as an exocrine gland in the male reproductive system. It is a firm, partly muscular, chestnut sized gland near the neck of the urethra in males. Formation and Orientation The prostate is usually formed within the ninth week of the embryonic stage in reproductive development. The prostate can be separated into either “lobes” or “zones”. When looking at a prostate divided into zones, there are four distinct regions. The first zone is the Peripheral...

Testicles
2013-03-04 15:03:13

The testicles are the male reproductive organs that serve as a part of both the nervous and reproductive systems, acting as the ovaries’ counterpart. The testicles work to produce sperm and introduce chemicals such as testosterone. Formation and Orientation There are normally two testicles in the average male anatomy. These can be found in the protective sack called the scrotum. Two phases mark the growth of the testicles. During the embryonic stage, there is a possibility of this...

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Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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