Health claim
“Global average sperm counts have declined by about 50% since the 1970s.”
Claim checked — strong evidenceMedium riskother
Evidence Summary
Multiple well-designed studies consistently support this claim.
Multiple large-scale meta-analyses have found a roughly 50% drop in average sperm concentration and total count globally since the 1970s, and this trend is broadly accepted in the scientific literature.
Extracted from
Why Male Fertility Is Declining Drastically | Dr. Shanna Swan & Dr. Andrew HubermanHuberman Lab Clips
Dr. Shanna Swan and Dr. Andrew Huberman discuss the documented decline in male sperm counts, its potential health implications, and factors that may influence fertility.
Watch breakdown →