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Latest Sperm Stories

2010-02-05 13:07:44

UCSF researchers have identified an elusive molecular regulator that controls the ability of human sperm to reach and fertilize the egg, a finding that has implications on both treating male infertility and preventing pregnancy. The team of biophysicists and molecular biologists also broke through a previous barrier to this research by developing a method to record electrical activity of a single human sperm cell through a process called patch-clamping. The new findings shed light on a number...

2009-10-15 13:31:00

Prototype Anonymous Donor Database In Development FAIRFAX, Va., Oct. 15 /PRNewswire-USNewswire/ -- Four of America's leading donor sperm providers have formed a new, non-profit association, the Association of Gamete Donor Providers (AGDP). AGDP will help donor gamete providers to share information and services, enhance educational programs and promulgate policies and activities to benefit individuals and organizations involved in all aspects of building families with the help of donor...

2009-09-08 12:13:24

TAU study offers an evolutionary explanation for today's fertility problems About 10% of all couples hoping for a baby have fertility problems. Environmentalists say pollution is to blame and psychiatrists point to our stressful lifestyles, but evolutionary biologist Dr. Oren Hasson of Tel Aviv University's Department of Zoology offers a different take. The reproductive organs of men and women are currently involved in an evolutionary arms race, he reports in a new study. And the fight isn't...

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...

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2009-07-08 10:30:00

For the first time ever, British scientists announced on Wednesday they had created human sperm using embryonic stem cells, AFP reported. A new technique developed by researchers led by Professor Karim Nayernia at Newcastle University and the NorthEast England Stem Cell Institute (NESCI) allows the creation of human sperm in the laboratory. While the researchers believe the discovery could eventually help men with fertility problems, other experts are not yet convinced that fully developed...

2009-07-07 13:08:15

The recession has prompted a surge in people seeking payment for donating their sperm or eggs, health officials say. Sperm banks have reported a sharp increase in the number of would-be donors. But they add many of them are dissuaded when they realize there's an exhaustive process of screening that must be completed, USA Today reported Tuesday. Kim Springfield of Health News, an Irvine, Calif., company that operates a national referral service for donors, told the newspaper that inquiries...

2009-06-30 14:40:44

Daily sex -- or ejaculating daily -- for seven days improves men's sperm quality by reducing the amount of DNA damage, an Australian researcher found. Dr. David Greening, an obstetrician and gynecologist at Sydney IVF in Wollongong, Australia, studied 118 men who had higher than normal sperm DNA damage as indicated by a DNA Fragmentation Index. Men who had more than 15 percent of their sperm damaged were eligible for the trial. At Sydney IVF, sperm DNA damage is defined as less than 15...

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2009-06-29 13:10:00

Men who spend more time riding a bicycle are increasing their chances of damaging their sperm, according to new research. Previous studies have found a link between cycling and low sperm quality. The recent study showed that triathletes who rode more than 186 miles each week had less than 4 percent normal looking sperm. Professor Diana Vaamonde, from the University of Cordoba Medical School, Cordoba, Spain, presented the new findings at the annual conference of the European Society of Human...

2009-06-22 07:15:00

Technology Intended to Improve Outcome of Intrauterine Insemination and In Vitro Fertilization Procedures LA JOLLA, Calif., June 22 /PRNewswire-FirstCall/ -- Cordex Pharma, Inc. (OTC Bulletin Board: CDXP) announced today that it has entered into an agreement with Clinical Trials International, LLC, (CTI), regarding a license to develop and market Cordex's drug candidate, ATPotent(TM). ATPotent(TM) is a novel ATP-based drug candidate designed for in vitro (outside of the human body)...

2009-06-18 15:16:39

In the competition for a partner, males typically have to vie with each other "“ be it with a colorful plumage, a large set of antlers or a seductive courtship dance. The females of some species, however, copulate with several males, so that rivals even after mating are still not defeated. So their sperm become rivals. Because greater size can increase the chance of fertilization, in some species truly giant sperm cells have evolved "“ some grow to be even larger than the male...


Word of the Day
bibliopole
  • A bookseller; now, especially, a dealer in rare and curious books.
This word comes from a Greek phrase meaning 'book seller.'
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