Have Sperm Counts Declined? Definitely Yes, Says First-Ever Meta-Analysis on Trends in Sperm Count (video) The Hebrew University of Jerusalem Share Print E-Mail Loading video... Caption A rigorous and comprehensive meta-analysis of data collected between 1973 and 2011 finds that among men from Western countries, sperm concentration declined by more than 50%, with no evidence of a 'leveling off' in recent years. These findings strongly suggest a significant decline in male reproductive health that has serious implications beyond fertility and reproduction, given recent evidence linking poor semen quality with higher risk of hospitalization and death. Credit (Video credit: Hebrew University) Usage Restrictions Please include video credit Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.