About 30% of sterility cases are due to problems in the male. These problems can be found at the pretesticular, testicular, posttesticular or even semen level.
For example, leading an unhealthy lifestyle or having diabetes would cause alterations in the hormonal axis and could be the cause of male sterility. In addition, genetic alterations, varicocele, oncological treatments or obstruction of the seminal ducts, among others, would also be a cause of male infertility.
Therefore, when a couple hasbeen trying pregnancy for some time and it does not come, the best thing to do is to begin with fertility studies in both the woman and the man.