Primary hypogonadism is when the gonads do not function properly, leading to a decline in male sex hormones (hypoandrogenism) and female sex hormones (hypoestrogenism). The possible causes of ...

But the cost of the gonads — the orange tongues found inside an urchin — is steep. Just one 200-gram box of premium gonads can cost $100. In Japan, some sea urchins can sell for five times that.