Differenece between women sperm men

CHOOSING the sex of babies may soon be possible using a technique announced today for separating human sperm on the basis of size and shape. For the first time, scientists have been able to detect small but significant physical differences between human sperm carrying the X-chromosome - which result in girls - and those with the Y-chromosome, which lead to boys. The scientists suggest the difference between the two types of sperm could be used to select the sex of babies conceived by artificial insemination. Colin Matthews, professor of reproductive medicine at the University of Adelaide, Australia, and his colleague Ke-hui Cui report in the journal Nature how they analysed individual sperm, with the Y chromosome and with the X chromosome. They took photographs of the sperm, magnified 30 times. Professor Matthews told the Independent: 'It may be possible in future to use this to perhaps separate male and female sperm.

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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.

Some coastal squids exhibit male dimorphism large and small body size that is linked to mating behaviors. Here, we report that sperm clusters are able to move en masse. Sperm are cells that are highly specialized to fertilize an egg. Therefore, in each species, sperm are selected for optimum morphology and function, and as a result, sperm populations generally become homogeneous within species. Meanwhile, alternative mating tactics, 1 usually found in male dimorphism, can make a difference in sperm competition risk, which might have an impact on sperm morphological and functional traits.