Yes, a human male can live a normal life with one testicle; he will likely have normal fertility within the context of a single monogamous relationship as well. If the location of the other testicle is in question, a medical doctor should be consulted. If the other testicle is missing for known reasons, the man's doctor should be informed of those reasons so that he/she can make medically sound decisions regarding screening testing for other diseases.
Absolutely ! A man can still father a child if he has only one testicle.
A man's testes can hold between 80 and 100 million sperm if he is healthy.
To create Testosterone, which basically makes a man like a man, and sperm, to reproduce.
Not if only one testicle is removed. You can produce sperm just fine with only one testicle
Frogs don't have testes. They have one opening in the body which is called a cloaca.
The penis and testes are the primary sexual organs for a male.
No, the size is irrelevant for having sex.
no
Most men have 2 testes, but some have less.
I don't really see how it's physically possible for a man's testicle to just disappear, but if it's happened to you, I'd suggest seeing a doctor as soon as possible.
Surgical removal of one or both testes.
It might affect that by making the testes grow uncontrollably so it can't make sperm because it can't sop growing.