We all start as egg cells. And after being fertilized, based on the information of the sex chromosomes, the new developing organism must turn into a male or a female. A new research published in "Journal of Clinical Investigation" shows that testosterone, the male hormone, is responsible for turning an embryo into a ... |
18 March 2008
14:06 GMT |
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In a world contaminated with so many hormone mimicking chemicals, no wonder that sexual function in both men and women is affected. Stress is another main factor proved to be added to the increasing rates of couple sterility in the agitated western life style. And as if not being able to procreated was not enough, an... |
8 February 2008
14:06 GMT |
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In almost half the cases, man is the cause of a couple's infertility. In the last 4 decades, male fertility has been plummeting in developed countries, with sperm count decreasing by 1.5 % annually in the US and 3% in Europe and Australia. This, combined with the tendency of later pregnancies (that is after a wo... |
10 October 2007
14:11 GMT |
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The same factor that makes testicles produce millions of sperms daily can lead to their employment as a source of stem cells in treatments against severe conditions, like Alzheimer's (senile dementia), Parkinson's, stroke, diabetes and certain cancers. A team at the Weill Cornell Medical College has managed... |
21 September 2007
14:06 GMT |
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Sperm competition can go really wild, and sometimes, the race for fertilizing an egg goes beyond natural selection. This seems to explain the higher than normal rate of a mutation that stops skull growth and induces joined fingers and toes, as the same mutation also spurs the division rhythm of the cells that form sp... |
31 August 2007
14:26 GMT |
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There are increasingly more cases in which the inner sexual feelings do not march the external sex. And it's not merely about homosexuals. There are also numerous cases of ambiguous genitalia in humans, about 1: 4500 births."It is usually the first question new parents are asked - is it a boy or a girl? But when... |
25 July 2007
14:36 GMT |
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What would women do without men in their lives? The vital role of the men in saving women is proven by a new research showing how a protein from testes protects women against a recurrence of ovarian cancer... These are the results of an early stage clinical trial checking a therapeutic vaccine against the illness. Th... |
24 July 2007
08:12 GMT |
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