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Sperm counts worldwide have halved over the past five decades, and the pace of the decline has more than doubled since the turn of the century, new research shows.
The international team behind it says the data is alarming and points to a fertility crisis threatening the survival of humanity.
Their meta-analysis looked at 223 studies based on sperm samples from over 57,000 men across 53 countries.
It shows for the first time that men in Latin America, Asia, and Africa share a similar decline in total sperm counts and concentration as previously observed in Europe, North America, and Australia.
The authors warn that the mean sperm count has now dropped dangerously close to the threshold that makes conception more difficult, meaning couples around the world may encounter problems having a baby without medical assistance.
The findings, published on Tuesday in the journal Human Reproduction Update, serve as "a canary in a coal mine," said Professor Hagai Levine, the study’s lead author from the Hebrew University of Jerusalem’s Hadassah Braun School of Public Health.
uk.news.yahoo.com
Scientific article here:
academic.oup.com
The international team behind it says the data is alarming and points to a fertility crisis threatening the survival of humanity.
Their meta-analysis looked at 223 studies based on sperm samples from over 57,000 men across 53 countries.
It shows for the first time that men in Latin America, Asia, and Africa share a similar decline in total sperm counts and concentration as previously observed in Europe, North America, and Australia.
The authors warn that the mean sperm count has now dropped dangerously close to the threshold that makes conception more difficult, meaning couples around the world may encounter problems having a baby without medical assistance.
The findings, published on Tuesday in the journal Human Reproduction Update, serve as "a canary in a coal mine," said Professor Hagai Levine, the study’s lead author from the Hebrew University of Jerusalem’s Hadassah Braun School of Public Health.
Sperm count drop is accelerating worldwide and threatens the future of mankind, study warns
Researchers warn of a global fertility crisis that "looks like a pandemic” as sperm counts drop sharply around the world.
Scientific article here:
Temporal trends in sperm count: a systematic review and meta-regression analysis of samples collected globally in the 20th and 21st centuries
AbstractBACKGROUND. Numerous studies have reported declines in semen quality and other markers of male reproductive health. Our previous meta-analysis repo
academic.oup.com
