Because of this, Kallmann syndrome is a type of hypogonadotropic hypogonadism disorder.

正因如此，Kallmann综合征是一种低促性腺激素性性腺功能减退症。

So, to recap: Kallmann syndrome is a type of hypogonadotropic hypogonadism where olfactory neurons and gonadotropin-releasing hormone neurons don't function normally.

Kallmann综合征是一种低促性腺激素性性腺功能减退症，其嗅觉神经元与促性腺激素释放激素神经元不能发挥正常功能。

The second cause of hypogonadism is secondary hypogonadism, which is also called hypogonadotropic hypogonadism because there are low levels of luteinizing and follicle stimulating hormones.

性腺功能减退的第二个病因是继发性性腺功能减退症，也称为低促性腺素性性腺功能减退症，因为LH和FSH激素水平在此病中都显著降低。