Wow, leave it to those plucky Japanese! Japanese scientists have finally created viable and fertile mammalian sperm in a culture dish! Scientists have been trying to do this for years, but they always got held up at the meiosis stage. Thats when cells divide, swap DNA, and the number of chromosomes per cell is cut in half. When sperm cells properly reach this stage, they are able to merge with an egg. All it took was replacing fe.

its as they age -- from libido to sperm quality -- and, in groups anal toys where there's intense competition, tend to lose out to younger males,' said Dr Tommaso Pizzari of Oxford University's Department of Zoology, an author of the report. 'However, old males remain capable of dominating the pecking order: When this happens they can monopolise access to females but, because of their sexual decline, they fail to fertilise all the eggs available. This implies an evolutionary conflict between ageing roosters and fertile hens.'

The researchers used four different experiments to separate out the influence of male and female factors on reproductive success -- something that is di.

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using a structured interview while also scoring for depressive symptoms.

Results show that in these subjects with erectile dysfunction, depression increases cardiovascular problems independently from other known risk factors. Furthermore, even the use of antidepressant medications did not alter the relationship between severe depressive symptoms and adverse cardiovascular events.

Recognizing depressive symptoms in subjects with erectile dysfunction is mandatory not only for improving their sexual life, but al.

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