Globally average sperm matters are “ falling at an accelerated price after halving over the last 40 years, ” according to a new research led by Israeli epidemiologist Hagai Levine.
Sperm counts are an indicator of fertility but also of male health in general: a low count might indicate an increased risk associated with chronic diseases, testicular cancer, and a decreased lifespan, experts said.
A study published in the Human Duplication Update journal collected information from more than 57, 000 men over 223 studies across 53 countries, which makes it the largest meta-analysis ever performed on the topic.
“ Overall, we’re seeing a significant worldwide decline in sperm counts of over 50% in the past 46 yrs, a decline that has faster in recent years, ” Levine told reporters.
Despite the decrease, the average sperm concentration is currently 49 million, still in the range considered “ normal” with the World Health Organization – between 15 and 200 million sperm per milliliter.
Nonetheless, the research has found that it is dropping at a rate of around one 1 percent a year.
Levine suggested that endocrine-disrupting chemicals or other environmental factors may play a role on this drop, acting on the fetus within the womb.
“ Additionally , lifestyle choices plus chemicals in the environment are adversely affecting this foetal development, ” Levine additional. The researcher similarly required global moves to stop the particular decline: “ We urgently call for global action to promote healthier environments for all types and reduce exposures and behaviours that threaten our reproductive : health. ”
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