New sperm production

Co-author Ghazal Alavioon is affiliated with Uppsala University. Republish our articles for free, online or in print, under Creative Commons licence. Sperm differ markedly in their swimming performance. This difference not only determines their success at fertilising an egg but may have direct consequences for the resulting offspring, our latest study shows.

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Sperm counts are on the decline – could plastics be to blame?

Why Sperm Counts Are Dropping For Men Today | GQ

Men who smoke marijuana may have higher sperm counts than those who have never used the drug, a surprising new study suggests. The findings are "not consistent" with previous research, which has suggested that marijuana has a harmful effect on men's testicular function, the researchers said. However, the study, published in the Feb. The findings are far from conclusive, and more research is needed to understand whether smoking marijuana could indeed, at certain levels, have a positive effect on sperm production.
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New gel that’s rubbed into shoulders to lower sperm count could be first male birth control

A recent study that tested both men and dogs added to concerns that chemicals in the environment are damaging the quality and quantity of sperm. Make a contribution. Fri 24 May S urprising new research into dog sperm has reproductive biologists concerned about the fate of their own species.
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Nearly one in eight couples in the U. As the root causes often remain a mystery, new research into the basic biology behind sperm development could one day lead to renewed hope for those wanting to grow their families. A lot is still unknown about how mammalian sperm develop and what is driving the differentiation program," says Sue Hammoud, Ph.
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