Two key measures linked to male fertility—sperm count and concentration—have Recent declines have been dramatic yearsAccording to a new Study raises concerns about future population growth. 

Globally, sperm concentrations have declined more than 50% between 1973 and 2018. according to a new analysis Published in by an international group of researchers the Human Reproduction Update journal on Tuesday. Meanwhile total sperm counts Inflation was at 62.3% the same period.

“Overall, we’re seeing a significant worldwide decline in sperm counts of over 50% in the past 46 years, a decline that has accelerated in recent years,” the Lead researcher and professor at the Hebrew University of Jerusalem’s Hadassah Braun School of Public Health, Hagai Levine, said in a statement

A 2017 paper from the The same researchers also found that decline Sperm counts It was increasing in North America, Europe and Australia. and New Zealand has a base on Samples taken between 1973 and 1974 and 2011.  

To build, the most recent study on Previous findings looked at South America and Asia. and Africa to Understand the decline Sperm counts All the world. Researchers discovered that the men of these regions are much more likely to have a job than they thought. have Also, there was a significant decline In sperm count the same as in the An earlier study. 

Researchers discovered that the sperm concentrations have fallen by 1.16% every year since 1972. Researchers looked at data after 2000 and found however, the Annual decline It was 2.6%

“Our findings serve as a canary in a coal mine,” Levine spoke. “We have a serious problem on our hands that, if not mitigated, could threaten mankind’s survival. We urgently call for global action to promote healthier environments for all species and reduce exposures and behaviors that threaten our reproductive health.”

The analysis does NOT examine the Causes the decline Concentration of sperm and Levine claimed that the count does not matter. “lifestyle choices and chemicals in the environment are adversely affecting this fetal development.”

The study is on the same day the world’s population hit 8 billion peopleAccording to the UN’s estimate. However, all indications point to a slowing. the The overall rate of population growth. It took 12 years for the world’s population to increase from 7 billion to 8 billion, but it’s expected to take another 15 years for It could reach 9 Billion. 

Meanwhile, the UN claims that fertility has dropped in many countries over the past decade. And the  “cumulative effect of lower fertility, if maintained over several decades, could be a more substantial deceleration of global population growth in the second half of the century,” the UN’s director of the Population division as stated in a statement

In the Researchers conclude that the sperm count is low. is An “imperfect proxy for fertility,” However, sperm concentration and Count is closely tied to fertility chances. 

“On a population level, the drop in mean [sperm concentration] from 104 to 49 million/ml that we report here implies a substantial increase in the proportion of men with delayed time to conception,” Researchers wrote in the study. “Thus, [sperm concentration] provides the most stable and reliable measurement for comparisons within and among populations and over time.”

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