From what I've heard and from what has been been said recently, there is an ingredient in hand sanitizer that makes males sterile. Hand sanitizer is known to kill bacteria but what is in the sanitizer gets absorbed into the body, which is what causes men to become sterile.
If the testes don't descend (drop) after birth, then the male can become sterile (infertile), and the risk of testicular cancer increases.
yes , they do.
nope
The main reason men become sterile is the cause of a low sperm count. One could also choose to become sterile and have a vasectomy so as to not have any more children.
It depends on why the man is sterile. There are many causes. If he has had a vasectomy, an operation to make him sterile, that operation can now be reversed for a majority of men, if they want to go through the hassle and expense. If a man is sterile for some other reason, there are many possible medical reasons and many possible treatments. Only a fertility expert knows all about it.
No.
Yes. Transsexual men can have babies before transition. Transsexual women can father children before transition. After surgery, when their transsexualism is eliminated, they become sterile.
If a man practice handjob regularly during his teenage, then his sperm count is reduced to such an extent that he may become sterile.
no
Women don't become sterile from smoking marijuana, it's just unadvised to smoke WHILE already pregnant
Some type of disease or physical damage to the gonads.