hypogonadism

noun

hy·​po·​go·​nad·​ism -ˈgō-ˌnad-ˌiz-əm 

1

: functional incompetence of the gonads especially in the male with subnormal or impaired production of hormones and germ cells

2

: an abnormal condition (as Klinefelter's syndrome) involving gonadal incompetence