Yes, Sperm Counts Are Plummeting... And Scientists Are Worried

SeekerPublished: July 10, 2018Updated: July 11, 201825 views
Published: July 10, 2018Updated: July 11, 2018

There's no easy way to say this so I'm just going to come right out and say it: Gentlemen, it would appear our sperm counts are dropping... a lot.That's according to a new meta analysis of studies that have looked at sperm counts from men in western countries going all the way back to 1973. The study found that the average total sperm count has dropped by over 59%, while the average concentration of sperm has dropped over 52 percent. I know that might be hard to hear, and denial is a natural response. Even the lead researcher said it was hard to believe. But unfortunately it looks like the study is pretty solid.There have been meta analyses of sperm count studies in the past, but critics have never been satisfied with them. One such meta analysis from 1992 --known as the Carlsen study-- looked at 61 studies and also found sperm counts were dropping. But critics say the Carlsen study is flawed because one of the studies it used contributed 30% of the participants, disproportionately skewing the results. Even with this significant flaw, the authors of the latest meta analyses describe the Carlsen study as a "seminal paper" on sperm count, which is the funniest joke I've ever heard a scientist make and I wish I thought of it.Anyway, with their latest paper, these smart-alecs sought to correct the Carlsen study's misfires. They drew their data from 185 studies, the largest of which contributes only 5% of the participants. The study used data from almost 43,000 men who were well distributed across nearly 40 years and 50 countries. This video, "Yes, Sperm Counts Are Plummeting... And Scientists Are Worried", first appeared on seeker.com.

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