The same genetic mutations behind gorillas’ small penises can hinder fertility in men

Photo of a silverback gorilla walking on all fours in a field in front of trees, looking into the camera.

Silverback gorillas are known for their impressive, bulging physiques – and their rather modest genitals. Now scientists have discovered a potential genetic link between these apes’ small limbs and infertility problems in male humans.

On average it is only 3 centimeters long, the penis of an adult man gorilla (Gorilla) is the smallest phallus of all the apes. The gorilla’s genital size is associated with other deficiencies in its reproductive capabilities, such as a low sperm count compared to other primates, and sperm with poor motility and a reduced ability to bind to eggs.

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