First, only males have testicles, but they are suspended , in a sac of skin (Scrotum), between the legs (more specifically between the penis and the anus).
They are between your legs, below your penis.
You can find the answer here: http://en.wikipedia.org/wiki/Testicle
You cannot "grow" testicles. But if you are male you should have testicles and they will develop as you grow.
testicles = cōleī
Testicles LOL
No, it is injected into a vein, not the testicles.
Cryptorchidism is a medical condition wherein the testicles are undescended. Undescended testicles are testicles that don't move lower into the scrotum.
The location of the testicles is under the penis, in the scrotum.
Urologists treat testicles.
Yes. Your testicles are inside the scrotum.
No. Without testicles, there is nothing to create them.
No, but they might examine your testicles.