An alternative term for fertilizing an egg is "conception."
I am very, very afraid that you think that some weird outfit is going around counting sperm in a spot that cannot be gotten to, let alone with the microscope that would be needed. Your answer: no one knows.
No.
Kill it. maybe
Sperm cell.
Sperm fertilizing an egg.
To fertilize an egg as part of the process of reproduction.
1 in 300 million
1 in 300 million
is the method of fertilizing a human egg in a test tube
Hephaestus was born by something in his mother that makes the egg not need fertilizing.
Viable sperm is sperm that is capable of fertilizing an egg and resulting in, when combined with a viable egg, offspring. Hope this helps!