What is hypogonadism?
Hypogonadism is when the testicles (also called gonads) don't make enough testosterone. Primary hypogonadism happens when there is a problem or abnormality in the testicles themselves. Secondary hypogonadism happens when there's a problem with the pituitary gland in the brain, which sends chemical messages to the testicles to produce testosterone.
Hypogonadism can happen during fetal development, at puberty, or in adult men.
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