Latest Semen quality Stories

2010-11-29 16:31:39

European Science Foundation publishes new report on male reproductive health Reduced male fertility may be making it even harder for couples to conceive and be contributing to low birth rates in many countries, reveals a new European Science Foundation (ESF) report launching at a meeting in Paris. More than 10% of couples worldwide are infertile, contributing to the growing demand for assisted reproduction techniques such as in vitro fertilisation (IVF) for which Robert G. Edwards won the...

2010-10-28 09:30:00

Researchers have linked a chemical compound commonly used in the making of plastics to low-sperm counts and other reproductive issues among Chinese factory workers, according to a study published in the latest edition of the journal Fertility and Sterility. The study, which was funded by the National Institute of Occupational Safety and Health (NIOSH) and completed at the Kaiser Permanente Division of Research in Oakland, California, analyzed the urine levels of male workers in China. Those...

2010-10-28 02:00:00

OAKLAND, Calif., Oct. 28 /PRNewswire/ -- Increasing urine BPA (Bisphenol-A) level was significantly associated with decreased sperm concentration, decreased total sperm count, decreased sperm vitality and decreased sperm motility, according to a Kaiser Permanente study appearing in the journal of Fertility and Sterility. The five-year study recruited 514 workers in factories in China and compared workers who had high urine BPA levels with those with low urine BPA. Men with higher urine...

2010-08-12 06:25:00

Obesity in younger men may lead to lower sperm count, a new study reported in the journal Fertility and Sterility suggests. The findings add to evidence that ties obesity to relatively poorer quality sperm. Several recent studies have found that compared with thinner males, obese men tend to have lower sperm counts, fewer rapidly mobile sperm and fewer progressively motile sperm, which refers to sperm that swim forward in straight lines rather than swimming about aimlessly. But age is also...

2010-08-04 14:12:29

In one of the first human studies of its kind, researchers have found that urinary concentrations of the controversial chemical Bisphenol A, or BPA, may be related to decreased sperm quality and sperm concentration. However, the researchers are quick to point out that these results are preliminary and more study is needed. Several studies have documented adverse effects of BPA on semen in rodents, but none are known to have reported similar relationships in humans. BPA is a common chemical...

2010-06-16 14:43:09

Inbred male sperm have been found to fertilize fewer eggs when in competition with non-inbred males according to a new study by the University of East Anglia. Research into the breeding habits of the red flour beetle, published June 15 in Proceedings of the Royal Society B, shows that the reduced fitness of inbred beetles, known as 'inbreeding depression', reveals itself in competitive scenarios. Inbreeding is a potentially important problem in declining species across the world, and...

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...

2009-06-30 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...

2009-06-30 12:30:00

Having sex on a daily basis improves sperm quality in men, which can enhance their chances of conceiving a child, researchers reported on Tuesday. Dr David Greening of Sydney IVF headed the new study of 118 men to show that daily ejaculation for seven days improves their sperm quality by reducing the amount of DNA damage. Greening presented his findings to the 25th annual meeting of the European Society of Human Reproduction and Embryology in Amsterdam. Prior to the study, researchers had...

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...

Word of the Day
  • Like a worm in form or movement; vermiform; tortuous or sinuous; also, writhing or wriggling.
  • Like the track or trace of a worm; appearing as if worm-eaten; vermiculate.
  • Marked with fine, close-set, wavy or tortuous lines of color; vermiculated.
  • A form of rusticated masonry which is so wrought as to appear thickly indented with worm-tracks.
This word ultimately comes from the Latin 'vermis,' worm.