According to his research, men who scored higher on multiple intelligence tests had higher numbers of healthy sperm in their ejaculate. Conversely, with low intelligence test results, there were fewer spermatozoa and they were less mobile.
These two dimensions, sperm health and intelligence, are linked through a complex chain of biological and environmental interactions designed to help women choose a mate, says Jeffrey Miller.
IQ is a good indicator of a person’s overall health, Miller said. “In our brain, only half of the genes we have are turned on. This means that by the intellect of men, women can approximately, but it is quite easy to judge about past mutations transmitted at the genetic level, ”he believes. True, the scientist noted that from this study it is impossible to conclude that the quality of sperm and the level of intelligence are determined by the same genes.
The link between sperm and intelligence was revealed in an audit of data collected in 1985 to study the long-term effects of exposure to Agent Orange, a chemical weapon used in Vietnam.
In 1985, 4402 Vietnam War veterans affected by contact with Agent Orange were subjected to various medical and psychological examinations for three days. In particular, 425 veterans provided samples of their semen.
Processing the data obtained, Miller’s group revealed a statistically significant relationship between the level of language and arithmetic skills of the subjects and the quality of their sperm. This result was obtained after taking into account all additional factors – age, drugs and drugs that veterans were taking, etc.
Agent Orange was intended to destroy the forests in which the Viet Cong were hiding. The composition of the tool included significant amounts of dioxins that cause a number of serious diseases in people, including cancer.
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