Are there places in the body where SARS-CoV-2 can hide from the immune system?
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Some viruses can hide out in the body and reemerge at later times. Which viruses do this, and can the new coronavirus do this too?
Testosterone is primarily made in the testes, and creates many of the characteristics we see in adult men.
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Disorders affecting penis development are among the most common birth defects seen in humans, and rates are on the rise.
It’s just a tiny part of the Y chromosome that kickstarts the development of testes.
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There are many cultural and social factors involved in making a baby into a man or a woman. But biologically speaking, sex starts when you’re just a tiny group of cells in your mother’s uterus.
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We have the penis of a monogamous primate yet our body sizes suggest our ancestors slept around a lot.
Most men don’t know the normal size of testes.
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Men with Klinefelter’s syndrome are infertile, as the extra X chromosome affects the ability to produce sperm.