The causes are many

The simplest of irregularities ? in hormone levels, for instance ? may cause fertility disorders. The causes for infertility are found at an equal rate of about 40 percent in both men and women. In ten percent of cases, disorders are found in both partners. In the remaining ten percent, no cause can be found.

Using just a few, conclusive tests, we can usually discover the "snag" fairly quickly. On the following pages, we summarise the causes which are most frequently found:
Common causes in women: In women there are a great many reasons for infertility. The exact cause can only be determined on an individual basis. Below we briefly explain the most common causes.