The condition is called cryptorchidism. It occurs when one or both testicles fail to descend from the abdomen into the scrotum before birth. Treatment may include hormone therapy or surgery to move the testicle into the correct position.
Congenital: adj. # Of or relating to a condition that is present at birth, as a result of either heredity or environmental influences: a congenital heart defect; congenital syphilis.# Being or having an essential characteristic as if by nature; inherent or inveterate: "the congenital American optimism that denies conflicts and imagines all stories having happy endings"(Robert J. Samuelson). "Mark has a congenital defect that prevents him from playing sports"
Polyorchidism (having more than two Testicle) is a very rare condition, however it does happen. However, most commonly the additional growth is not a testicle at all, and is instead an abnormal mass of cells or the result of damage. If you have this condition, make your doctor aware of it so they can ensure it is not a risk to your health.
A 30 year old will have no problem having children if he has only one testicle, as long as that single testicle is in good health.
Is having just one testicle normal, no. Normal is men have two testicles, but it does happen. Sometimes due to an accident or illness, sometimes a boy is born with only one developed testicle and as long as it is healthy, your sex life and fertility will not be effected. Make sure you see a doctor to ensure you don't have an undescended testicle or a hernia. If the second testicle is trapped in your abdomen, it can be strangled and the one testicle you can see could end up slipping through the hernia too.
A guy with one testicle will have the same change in his voice that he would have if he had two.
Having one testicle is not going to have any affect on your ability to play football.
The congenital disorder caused by having an extra 21st chromosome is called Down syndrome. It is characterized by physical features such as a flat face, short stature, and intellectual disabilities.
It should not affect performance however may effect sperm count and reproductive capability.
Polyploidy
smoker powerful throat/congenital
no , hes having a testicle signing in north Carolina