Unexplainable Are humans running out of sperm?
Jan 12, 2022
Sperm counts have been declining over the last four decades, creating buzz about a potential 'spermageddon.' Various factors like environmental influences and lifestyle choices are explored. Despite alarming headlines, the scientific community is divided, pointing out inconsistencies in research. Historical biases and funding disparities in sperm studies raise critical questions about male fertility. The impact of IVF on sperm research and the need for a more nuanced discussion about reproductive health are also highlighted.
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Early Sperm Studies
- Early sperm studies had significant flaws, including inconsistent participant selection and lack of control for factors like age and recent sexual activity.
- These flaws led to unreliable data and varying results, making it difficult to draw accurate conclusions about sperm health.
2017 Meta-Analysis of Sperm Studies
- A 2017 meta-analysis, re-analyzing 40 years of sperm studies, suggested a decline in sperm counts in some Western countries.
- This study, controlling for factors like age and fertility issues, sparked the "spermageddon" panic.
Shauna Swan's "Spermageddon"
- Shauna Swan, co-author of the 2017 study, warned about potential human extinction if sperm decline continues at the observed rate.
- Her book "Countdown" and media appearances fueled the "spermageddon" narrative, attracting attention from various platforms.
