Brainier men have better sperm

Reporting their findings in the journalIntelligence, researchers from the Institute of Psychiatry in the UK say that men with higher intelligence tend to produce better quality sperm. This, say the researchers, suggests a closer-than-expected relationship between intelligence and evolutionary fitness.

The intelligence/sperm analysis was conducted as a precursor to possible further study involving the associations between intelligence, health, fertility, and overall fitness. In other words, the likelihood of surviving and reproducing under evolutionarily-typical conditions.

The data came from more than 400 former US soldiers who had undertaken detailed intelligence tests and also provided semen samples. The researchers examined the relationships between intelligence, semen quality (sperm motility, sperm concentration, sperm count), age, and the main lifestyle factors known to predict health: obesity, alcohol, tobacco, marijuana and hard drugs.

The researchers found that, independently of age and lifestyle, intelligence was correlated with all three measures of semen quality. The correlations were small but highly statistically significant, according to lead researcher Rosalind Arden. “This does not mean that men who prefer Play-Doh™ to Plato always have poor sperm: the relationship we found was marginal. But our results do support the theoretically important ‘fitness factor’ idea. We look forward to seeing if the results can be replicated in other data sets,” she added.

Arden thinks that there may also be another reason for the link and that intelligence may indicate underlying, genetically-based biological fitness. The reason, explains Arden, is that genes influencing intelligence might also contribute to hundreds of other characteristics. If so, tiny mutations that impair intelligence may also harm other characteristics. We all carry thousands of mildly harmful mutations, but some people carry more than others. More mutations may cause lower intelligence and worse health.

“We were interested in testing the idea that if most of our genes act on many characteristics, there might be a weak, but discoverable, relationship right across all of our characteristics – from nose to toes. This set of weak relationships would give rise to a ‘fitness factor’ in evolutionary terms,” concluded Arden.

Related:
St Valentine’s Day Sperm Massacre
Drink-Up For Superior Sperm
Semen: A Potentially Nasty Brew

Source: Institute of Psychiatry, Kings College

, ,

Comments are closed.

SPERM SEWING MACHINE OIL 1880s DUG LUBRICANT BOTTLE FROM SPERM WHALE FOR GUNS picture

SPERM SEWING MACHINE OIL 1880s DUG LUBRICANT BOTTLE FROM SPERM WHALE FOR GUNS

$27.00



SPERM WHALE Plastic Figure picture

SPERM WHALE Plastic Figure

$4.99



Vtg 70s 80s 3” Trucker Hat Iron On Patch Sperm Whale Logo Rare Green picture

Vtg 70s 80s 3” Trucker Hat Iron On Patch Sperm Whale Logo Rare Green

$7.80



NASA MICRO-11 SPERM-03 SPACEX CRS-14 RESUPPLY MISSION PATCH - 3.5” - REISSUE picture

NASA MICRO-11 SPERM-03 SPACEX CRS-14 RESUPPLY MISSION PATCH - 3.5” - REISSUE

$11.00



Prank Magnet, 1 Gallon Donor Club Sperm Bank (Pranks, Practical Jokes), 10

Prank Magnet, 1 Gallon Donor Club Sperm Bank (Pranks, Practical Jokes), 10" x 3"

$7.99



Antique 19th Century Sperm Sewing Machine Oil Bottle with Label C.L. Cotton Earl picture

Antique 19th Century Sperm Sewing Machine Oil Bottle with Label C.L. Cotton Earl

$49.99



NEW OLD STOCK VINTAGE THE SPERM BANK VERY FUNNY MUST READ  picture

NEW OLD STOCK VINTAGE THE SPERM BANK VERY FUNNY MUST READ

$27.49



Cast Iron SPERM WHALE Open Here Beer Bottle Opener BEACH BAR Man Cave Nautical picture

Cast Iron SPERM WHALE Open Here Beer Bottle Opener BEACH BAR Man Cave Nautical

$6.99



Sperm Whale c90 Y/O Trade Ad Card picture

Sperm Whale c90 Y/O Trade Ad Card

$6.69



Sperm Whale Pewter Lapel Pin Badge/Brooch Cute Gift BNWT/NEW picture

Sperm Whale Pewter Lapel Pin Badge/Brooch Cute Gift BNWT/NEW

$7.54



Powered by WordPress. Designed by WooThemes