For older men, an antioxidant-rich diet, or multivitamin, may be in order. A study by scientists at the U. Department of Energy's Lawrence Berkeley National Laboratory found that men over 44 with high vitamin-C diets had 20 percent less DNA damage to sperm than their peers who consumed the least vitamin C. Antioxidants, vitamin E, zinc and folate had similar effects, the researchers reported in in the journal Fertility and Sterility. Turns out guys, most of your sperm are not so photogenic. That means, for most men, most of their sperm are funny looking," writes Dr.
We've only just found out exactly how sperm wiggle their tails to swim
Sperm hyperactivity discovery could lead to better fertility tests - BioNews
The female hormone progesterone kicks sperm into overdrive so they can make a fast beeline for the egg. Now scientists have figured out how: The hormone links up with a specialized protein that signals the sperm's tail to wiggle back and forth, helping propel the little guy to its target. When progesterone binds the receptor referred to as catsper, it opens a channel in the membrane, sending a wave of calcium spiking down the sperm body, which causes this back-and-forth wiggling of its tail. The research is outlined this week by Lishko's team in the journal Nature and in a second study, from a team led by U. Until now, however, scientists didn't know how the hormone and catsper interacted.
Log in Advanced Search. A study which pinpoints exactly how sperm wiggle may one day help develop better diagnostic tests for infertility. Sperm were thought to go into a 'hyperactive' drive just before encountering the egg in order to break through the egg's wall, but researchers now suggest that this kind of swimming behaviour is much more common.
By Linda Geddes. The switch that transforms sperm into super-swimmers in the race towards the egg has been identified at last. The discovery could lead to drugs that boost male fertility and new forms of male contraceptives.