In male reason for infertility are related to sperm (azoospermia, oligospermia), problem with sperm delivery, due
to sexual dysfunction, and an obstruction etc. Hence complete work up has
to be done
to know the underlying cause.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps.