Articles with the keyword: 
Can you turn teeth into sperm?
sea-maid submitted, created time 5 months 3 weeks (www.newscientist.com)
COULD sacrificing a tooth enable some infertile men to father children? That's the goal of researchers in Brazil, who suggest that stem cells from human teeth can be coaxed into becoming sperm by being injected into the testes of mice.
Irina Kerkis of the Butantan Institute in São Paulo and her colleagues injected stem cells from the dental pulp of human teeth into the testes of live mice. The cells seemed to migrate to the tubules where sperm usually mature and differentiate into cells resembling human sperm 
Obesity Affects Sperm Production
sea-maid submitted, created time 5 months 4 weeks (www.time.com)
This research presented Wednesday at a meeting of the European Society of Human Reproduction and Embryology, scientists found that obese men have worse sperm than normal-weight men
How sperm and egg fuse into one could have applications in antiparasitics
jane2007 submitted, created time 9 months 2 weeks (www.nature.com)
How do sperm and egg fuse into one? A protein called HAP2 is involved with the fusion of egg and sperm in a wide range of species. This fusion protein could be targeted to stop parasites from reproducing.
Scientists create artificial sperm cells
Eric wu submitted, created time 11 months 1 week (blogs.usatoday.com)
A breakthrough news I have seen on Tencent.com in China. Here is the English version I have found on internet.
Air pollution causes sperm mutations
jane2007 submitted, created time 11 months 3 weeks (www.nature.com)
After reared mice in cages kept in a shed downwind of two steel mills and a busy highway in a Canadian city, researchers have found that air pollution can cause DNA mutations in the sperm of the mice. DNA in the sperm of the mice contained 60% more mutations, had more strand breaks, and had more bases that had been chemically modified via the addition of a methyl group. Air pollution will arrect human health and fertility.
salut8 submitted, created time 1 year 3 months (www.ncbi.nlm.nih.gov)
"Li YF et al report characterization of a novel testis and sperm specific protein, FSCB (Fibrous Sheath CABYR Binding), that is expressed post-meiotically and localized in mouse sperm flagella. FSCB was identified as a binding partner of CABYR, a calcium binding protein that is tyrosine phosphorylated during capacitation, Orthologous genes of FSCB are present in other mammals including rat and human and conserved motifs in FSCB include PXXP, proline-rich and extensin-like regions
Study looks at mitochondrial variation in sperm traits and sperm competitive ability
richard submitted, created time 1 year 3 months (www.eurekalert.org)
Study considered an important link in the field of sexual selection, where maternal inheritance of mitochondria may well have its greatest impact on sperm traits and competitive ability but thus far has been largely overlooked.
newsdigg submitted, created time 1 year 8 months (sciencenow.sciencemag.org)
Add infertility to the lengthy list of medical problems associated with diabetes. The first research to examine the relationship between the disease and reproductive health suggests that diabetic men carry a much higher percentage of sperm with damaged DNA than do their healthy counterparts.
No-scalpel vasectomies by skilled surgeons may speed recovery
julie submitted, created time 1 year 8 months (www.biologynews.net)
"Although no-scalpel vasectomies are becoming more popular among physicians and patients, there are no definitive statistics to confirm the superiority of this choice, and a new review's main conclusion is to underline the importance of training."
Mothers' beefy diet linked to sons' low sperm count
alpha submitted, created time 1 year 9 months (www.newscientist.com)
"Men born between 1949 and 1983 to women in the US who ate a lot of beef while pregnant have significantly lower sperm counts, a new study shows."
Marmosets may carry their sibling's sex cells
badboy submitted, created time 1 year 9 months (www.newscientist.com)
"If your testes or ovaries contained the sperm or eggs of another individual, how would you feel about reproducing? This extraordinary situation is experienced by marmosets, which have now been discovered to exhibit "germ line chimerism". It is a condition in which some of the sperm or eggs in their gonads come from another individual, and so do not contain their own DNA. "
An danger signal : Hot baths may lead men's infertility !
annatto submitted, created time 1 year 10 months (foodconsumer.org)
The study of a small group of infertile men led by a professor in the UCSF Department of Urology and director of the UCSF Male Reproductive Health Center and colleagues showed cessation of exposure to wet heat can drastically increase total motile sperm account, the effect lasting beyond three months in 45% of infertile men, indicating that the affected sperm production was reversible.
Rival Sperm Hook Up and Cooperate
collapsar submitted, created time 1 year 11 months (www.livescience.com)
Rats and mice have unusual sperm, possessing heads shaped like talons.
Scientists now reveal the larger the testicles of a rodent are, the more likely the sperm of that species are to curve like a claw. Researchers suggest the sperm use these hooks to snag each other and form speedy "trains" that cooperate to reach the egg first. Generally, sperm just has a head, and now some have a new weapon, ah, It is funny…
Rhett submitted, created time 1 year 11 months (sciencenow.sciencemag.org)
Darwinian Evolution Theory said every species competes for survival. Even sperm engage in the survival of the fittest. A new study indicates that the sperm of certain rodent species have evolved hook-shaped heads, apparently to beat each other to the egg. Sperm with better hooks are able to attach to more of their brethren, allowing them to form fast-moving chains that leave their rivals behind. It?.s really an interesting study, which address the long-held question about the unique shape of rodent sperm as well as the role competition has played in hook formation.
What is the secrets of male seahorses Sperm uncovered?
catherine submitted, created time 1 year 11 months (www.sciam.com)
Scientists have uncovered for the first time secrets about how male seahorses produce their young that could prove valuable in conservation efforts to save the vulnerable species. Unlike other animals and humans in which the female becomes pregnant, male seahorses carry their unborn in a pouchon their body and give birth to their young.
They manage to reproduce very efficiently with small amounts of sperm and have a short window of opportunity in which to fertilize the female eggs.
But seahorses face threats from habitat loss, pollution and fishing and are listed as vulnerable on the Worl
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