Tag Archives: sperm

Sperm compete by ‘poisoning’ competitors: study

It is literally a race for life when millions of sperm swim towards the egg cells to fertilize them. But does pure luck decide which sperm succeeds? As it turns out, there are differences in competitiveness between individual sperm. In … Continue reading

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Sperm quality improves after adding nuts to diet, study finds

Many environmental and lifestyle factors have been implicated in the decline of sperm quality, with diet being one of the most plausible factors identified in recent years. Moreover, several studies have reported a close association between the alteration of specific … Continue reading

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COVID-19 may impact male fertility, study finds

Severe cases of COVID-19 might harm the quality of a man’s sperm and possibly impact his fertility, according to a recent study published in the journal Reproduction. “This report provides the first direct evidence to date that COVID-19 infection impairs … Continue reading

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Looking for mutated sperm? Go FISH

Chemotherapy and radiation treatments are known to cause harsh side effects, including their impact on fertility. Extensive evidence shows that chemotherapy and radiation treatments are genotoxic, meaning they can mutate the DNA and damage chromosomes in patients’ cancerous and noncancerous … Continue reading

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New mechanism underlying male infertility

The sperm tail is essential for male fertility and thus for sexual reproduction. The tail, or flagellum, has to beat in a very precise and coordinated manner to allow progressive swimming of the sperm. Failure to do so can lead … Continue reading

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Molecular ‘barcode’ helps decide sperm success

A protein called CatSper1 may act as a molecular “barcode” that helps determine which sperm cells will make it to an egg and which are eliminated along the way. The findings in mice, published recently in eLife, have important implications for … Continue reading

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Researchers reveal why heat stress damages sperm

University of Oregon biologists have used the model organism Caenorhabditis elegans to identify molecular mechanisms that produce DNA damage in sperm and contribute to male infertility following exposure to heat. In humans, the optimal temperature for sperm production is just … Continue reading

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Delivering proteins to testes could treat male infertility

Problems with sperm development are often to blame for male infertility. Recently, researchers reported in ACS Nano a way to deliver a protein important for sperm cell production directly to mouse testicles, where it restored normal sperm development and allowed previously infertile … Continue reading

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Research identifies sperm biomarker associated with couples’ pregnancy probability

Researchers at the University of Massachusetts Amherst have identified a single-measure biomarker in sperm mitochondrial DNA that may predict male reproductive health and pregnancy success. The discovery applies not just to couples seeking care for infertility but also for the … Continue reading

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Sperm quality lowered by light from devices at night

Men might want to think twice before reaching for their smartphone at night. A new study found correlations between electronic media use at night and poor sperm quality. Preliminary results show that greater self-reported exposure to light-emitting media devices in … Continue reading

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