 [ Symptoms ] what are trigger point injections for tmj [ Disease ] not usually no in klinefelter syndrome a male is born with at least one extra x chromosome most males have one x and one y chromosome klinefelter males have an xxy chromosomal structure this condition usually renders these men infertile meaning they cannot father children they can have a normal sex life however if you suspect you or your son may have klinefelter syndrome your doctor can tell for sure with a simple blood test if the condition is detected before puberty testosterone can be given to help with normal body development i hope this provides the information you need