No, it is not always possible to spot when an egg is fertilized. Fertilization usually occurs within the female's reproductive tract shortly after ovulation, and this process is microscopic, making it invisible to the naked eye. In many species, there are no external signs to indicate that fertilization has taken place, and it often requires specific medical or scientific techniques to confirm.
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
To fertilize an egg as part of the process of reproduction.
Sperm cell.
Sperm fertilizing an egg.
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!