A global decline in sperm counts first identified in 2017 is accelerating, according to research that shows the phenomenon seen in other parts of the world is also affecting men in South America, Asia and Africa.
The analysis carried out by Professor Hagai Levine of Hebrew University of Jerusalem and Professor Shanna Swan at the Icahn School of Medicine in New York, found that the average sperm count globally more than halved between 1973 and 2018.
Since 1972 it had fallen by about 1 per cent each year, the researchers said. However since 2000, the annual decrease had been, on average, more than 2.6 per cent.
您已閱讀20%（615字），剩余80%（2489字）包含更多重要信息，訂閱以繼續探索完整內容，并享受更多專屬服務。