Infertility causes are many, with some being more often than the others, so at this webpage we will focus on those with higher incidence rate. The issue resulting in infertility is divided in half across the gender spectrum, but there are also overlaps so there are problems in both the male and the female, or no cause can be found so unexplained or idiopathic infertility exists.

The most common known causes of female infertility are anovulation, damaged or blocked tubes, reduced ovary reserve, endometriosis, late reproductive age, amenorrhea and genetic anomalies of the reproductive tract. Causes of male infertility can often be found in poor semen quality (number, motility and morphology), the reasons of which can be analyzed by conducting urology exams.