around 40 percent for a healthy male
... What?
10 years
Sperm have about three days to make it to the egg for fertilization before the egg passes out of the uterus and dies.
Just one.
Only one.
only one
For the same reason an Oak tree produces so many acorns. So that maybe one of them manages to make it to the egg and fertilize it.
four per spermatogonium
Just 1.
millions of sperm
11 sperms and 21 eggs
Hundreds of millions of sperm