Unfortunately you cannot tell without seeking medical advice. The first step would be to give a sample to the doctor to examine under a microscope. Your doctor will be able to tell straight away if it is a low sperm count or maybe if the sperm are deformed. Further genetic testing can tell of any abnormalities.
Most males will be fertile, as they do not go through a process such like menopause. Like a 76 year old has had children before, he was still exercising. But for your issue I would recommend getting a fertility test, from your doctor.
There's no sure way of telling, unless you see a Doctor or fertility specialist.
take him to a urologist
Take him to a hospital or to his family Doctor can do a sperm count to check to see what his levels are.
you can tell when you go to the doctors or where ever it is you get this checked out and if he has a low sperm count it means he is infertile
He needs to leave a sperm sample at the doctor so they can make a sperm count.
go to the doctor
Chlamydia won't cause a man to be fertile.
if you have your period, than no.
You could take to a lab or a vet they have these special machines that can tell if its fertile or not
NO
Unprotected intercourse, or not using contraception, between a fertile woman and a fertile man can lead to pregnancy.
The Most Fertile Man in Ireland - 2000 is rated/received certificates of: Finland:K-11 Iceland:12 UK:15
Yes, as long as the testicle is functioning properly then you can reproduce with one testicle.
tells the dates when the female is fertile
Unfortunately only a fertilty test could tell you this.
you really cant.. DONT TOUCH THEM. just leave them alone. the mother hen knows if there fertile or not. if there not fertile she'll push them to the side, if they are fertile she will sit on them. but sometimes a pushed aside egg is fertile and also it is always warm as the person said above DON'T TOUCH THEM!!
Any one fertile man and any one fertile woman can have a baby together. Your blood type is only important for the blood type your baby will have.