I leave that up to the couple. The definition of infertility is inability to get pregnant after one year of unprotected intercourse. Some couples want to know before a year, and it is not unreasonable to start with something easy such as a sperm count. Retrograde ejaculation is fairly uncommon and is typically associated with a neurologic disorder or previous abdominal surgery. It is not something that can be prevented, but it can be treated.
Treatment is based on the specific underlying problem.
The chances of a vasectomy failing are dependent upon whether or not the man has undergone an adequate test to show that he truly is sterile. Once he has been confirmed to be sterile, the chances of failure are approximately 1 in 4,500. Varicoceles are very common and tend to develop during adolescence. 15 percent of all men have varicoceles, but not all varicoceles affect fertility. It appears that decreased fertility is based on increased temperature within the testicles.