Sperm Whales Current Events | Sperm Whales News | 5
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Romance, schmomance - Natural selection continues even after sex
Some breaking news, just in time for Valentine's Day: Researchers have identified something called 'sperm competition' that they think has evolved to ensure a genetic future. In sexual reproduction, natural selection is generally thought of as something that happens prior to - and in fact leads to - the Big Event. view more (2007-02-13)
CSHL scientists discover how 'companion' cells to sperm protect them from genetic damage
In plant pollen grains, sperm cells, which carry the genetic material to be passed on to progeny, are cocooned within larger "companion" cells that are called pollen vegetative cells. These companions provide sperm with energy and nourishment, and push them towards their targets during fertilization. view more (2009-02-06)
First research to show that diabetes damages DNA in men's sperm and may affect fertility
Scientists have found that sperm from diabetic men have greater levels of DNA damage than sperm from men who do not have the disease. They warn that such DNA damage might affect a man's fertility. view more (2007-05-03)
Tachographs for diving animals
Seals, sea lions and penguins have two things in common with whales and dolphins: They are all ocean swimmers and evoke human sympathy - not only from children. Especially when whales become stranded or seals fall victim to an epidemic, some of us ask: How did this happen? Could this be prevented in future? The job of answering such questions lies... view more... (2002-12-20)
Maritime Fishery In Chukotka
Research by scientists from Kirov and Anadyr have found that the population of Chukotka revert to traditional ways of procuring food. Since the late 1990s, people have started to catch maritime animals more actively and go fishing, mushroom and berry-picking. For two or three thousand years, maritime animals have been traditionally the primary... view more... (2003-09-05)
Size did matter
The mystery of giant sperm present in some living animal groups today has taken on a new dimension. In one group of micro-crustaceans new evidence shows the feature is at least 100 million years old. view more (2009-06-19)
Small RNAs can play critical roles in male infertility/contraception
University of Nevada School of Medicine scientists in the Department of Physiology and Cell Biology have discovered insight into the reproductive workings of the male sex chromosome that may have significant implications for male infertility and contraception. view more (2009-04-10)
Minimally invasive treatment helps infertile couples conceive
Couples struggling with infertility face uncertain odds when considering various treatment options. But a new study reveals that embolization, a minimally invasive treatment for arguably the most common cause of infertility in men, can significantly improve a couple's chances for pregnancy. view more (2006-11-29)
Treating male infertility with stem cells
New research has examined the usefulness of bone marrow stem cells for treating male infertility, with promising results. The related report by Lue et al, "Fate of bone marrow stem cells transplanted into the testis: potential implication for men with testicular failure," appears in the March issue of The American Journal of Pathology. view more (2007-03-02)
High levels of cycling training damage triathletes' sperm
The high-intensity training undertaken by triathletes has a significant impact on the quality of their sperm. view more (2009-06-30)
Good news and bad for dad this Father's Day
It was long believed that conception does not involve a meeting of equals. The egg is a relatively large, impressive biological factory compared with the tiny sperm, which delivers to the egg one copy of the father's genes. view more (2009-06-15)
Jumping genes discovery 'challenges current assumptions'
Jumping genes do most of their jumping, not during the development of sperm and egg cells, but during the development of the embryo itself. view more (2009-06-12)
US researchers sound warning note over postponing fatherhood - new findings confirm male fertility declines with age
Further evidence that men's fertility declines with age is reported today (Thursday 6 February) in Human Reproduction[1] - Europe's leading reproductive medicine journal. A study of 97 healthy non-smoking men aged from 22 to 80 has demonstrated that, as they age, men's semen quality declines. There was a continuous reduction in sperm motility... view more... (2003-02-02)
Levels of folate in men's diets is linked to chromosomal abnormalities in their sperm
Researchers have found an association between a vitamin found in leafy green vegetables, fruit and pulses and levels of chromosomal abnormalities in men's sperm. Men who consumed high levels of folate (a water-soluble B vitamin that occurs naturally in food) and folic acid (the synthetic form of the vitamin) tended to have lower levels of abnormal... view more... (2008-03-20)
Air dried sperm could allow home storage
Madrid, Spain: A novel method of preserving sperm through air drying is showing initial promise and has the potential to revolutionize sperm storage, allowing men awaiting in vitro fertilization (IVF) to take care of their sperm at home. Dr Daniel Imoedemhe, a consultant in reproductive medicine and endocrinology, working in Saudi Arabia, told the... view more... (2003-06-28)
Minimally invasive treatment improves male fertility
A minimally invasive treatment for a common cause of male infertility can significantly improve a couple's chances for pregnancy, according to a new study published in the August issue of Radiology. view more (2008-07-22)
Getting a leg up on whale and dolphin evolution
When the ancestors of living cetaceans-whales, dolphins and porpoises-first dipped their toes into water, a series of evolutionary changes were sparked that ultimately nestled these swimming mammals into the larger hoofed animal group. view more (2009-09-25)
Sex is thirst-quenching for female beetles
Female beetles mate to quench their thirst according to new research by a University of Exeter biologist. The males of some insect species, including certain types of beetles, moths and crickets, produce unusually large ejaculates, which in some cases can account for around 10% of their body weight. view more (2007-08-29)
Leaves of the khat plant harbour a key to improving men's fertility
A chemical that occurs naturally in the leaves of an African plant could boost men's fertility, researchers told the 20th annual conference of the European Society of Human Reproduction and Embryology on Monday 28 June. Khat (Catha edulis) is a plant that has been cultivated for centuries in East Africa and the Arabian peninsula. Chewing the... view more... (2004-06-28)
Testes to incubate stem cells
Men may cringe at the idea, but sperm-producing stem cells found in testicles could be extracted, grown in the lab, and frozen for future use. view more (2006-04-25)
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