The only certain way to know is through a sperm count. This is a laboratory test ordered by a physician.
3 years
Yes. But it is not fertile.
8 months
Yes
It is possible a male dog is fertile at 7 months, although this is very young to be deliberately breeding a dog.
As far as I know, it is very rare.
you don't need a male to have a fertile egg... the female body needs to be healthy and fertile to make a child which that part does take a male
Yes there is but it's difficult to explain how.
Chlamydia won't cause a man to be fertile.
If you are fertile and female and the gynaecologist is fertile and male then the possibility exists.
No. Being a virgin does not make a male more fertile. Losing his virginity will not make him more fertile either.
Sperm of a fertile male.
3 years
Yes. But it is not fertile.
8 months
Yes, but only if the crayfish eggs are fertile which requires a male. So if you can see the crayfish eggs on the tail of the crayfish that means that the eggs are fertile and will hatch in about 30 days
Have unprotected sexual intercourse with a fertile male !