Thursday , August 11 2022

More heat waves, less baby? Climate change can impair fertility of men, according to scientists, Europe Nevs & Top Stories



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LONDON (THOMSON REUTERS FOUNDATION) – Good eyes have been advised for a long time to wear boxing trousers and avoid hot tubs, to avoid excessive heat that has damaged their reproductive chances.

Now the same effect is emerging – but caused by stronger hot waves under the influence of climate change – may be behind a huge fall in the number of insects, say scientists, in a study published on Tuesday (November 13th) in Nature Communications.

They found that the males of red flour exhibited by the heat wave in the laboratory had half the expected number of descendants and that exposure to another hot melt 10 days later practically sterilized the husbands.

Small male flour, which damaged damaged heat, lived a shorter life and had much less success in reproduction, said Matt Gage, a biologist at the University of East Anglia and head of the research team.

While less pests in your flour may sound like good news, it seems that the same principles can be applied to the food chain – including potentially for people.

"For hundreds of years, we know that male fertility is sensitive to heat," Gage told the Thomson Reuters Foundation.

But, in particular, "the new research was very surprising," he said.

"Effectively, we're heating the planet and it prevents us from reproduction."

A 2017 study published in the Science journal showed that flying insects in German natural reserves fell more than 75 percent over the course of some 30 years.

Gage's team believes it can be associated with an increasing number of thermal waves over these decades – the concern for the planet's biodiversity – and potentially for potential parents – as climate change brings warmer, longer hot waves.

The rate of birth among people is already falling in very hot periods, and not only because the prospects for particularly sweating can sound quite untouchable, say scientists.

A study published in the Demographics magazine this year found that "sexual behavior was probably not an explanatory factor" behind the lips in the conception during heat waves, Gage said.

Instead, excess heat may have damaged sperm, which has led to a risk of genetic damage and less successful pregnancy, he said.

Can doctors one day issue warnings warning potential parents to avoid imagination during hot waves, in order to avoid potential genetic damage?

Gage is not so sure.

"We really would like to know what the mechanism of this transgenerational damage is," he said. "We know that radiation causes mutations in descendants. Possible heat can be a similar thing."

Regardless, the findings of new studies "are very important for understanding how species respond to climate change," he said.

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