I don't really understand your question but a guy starts making viable sperm at earliest about 11 years old.
All sperm cell are the same. It only takes one sperm cell to get a girl pregnant.
With a sperm cell and a egg cell.
One sperm cell
* No
Life begins when the egg cell and sperm cell unite to form the zygote.
Yes you can, it might be harder to get pregnant but it only takes one little sperm
It takes one sperm cell to get a girl pregnant
Pregnancy requires that a sperm cell come into contact with an egg. So if the "something" has sperm on, or in it, you can get pregnant. Otherwise, no -- no sperm, no fetus.
Sperm cells are zygotes (specialised cells with only 23 chromosomes).
Technically one sperm cell can get you pregnant, but it is unlikely with one.
It begins at puberty.
spermatid