FAST FIVE: Sperm Count Among Men Has Dropped 60 Percent Globally Over Past 45 Years: Study
Total sperm counts fell by 62.3 percent during the same period.
“We hope that the new evidence provided here will receive attention not only from clinicians and scientists but also from decision-makers and the general public,” the researchers wrote.
Researchers did note limitations to their study, however, including how the data was collected and reported as standards and methods for counting sperm have changed markedly over time.
That makes it harder to compare the latest sperm counts to historical data.
Additionally, researchers noted that complete elimination of all selection/recruitment bias was impossible because they were not able to collect semen samples at random.