How frequent is unintentional childlessness in Germany?

A representative sample of 1,019 married men and 1,133 women of reproductive age was interviewed and revealed that 21.5% had no children. Of these, 20% stated that their childlessness was deliberate. Of those who had not conceived about two thirds (men: 31%, women: 60%) had already sought medical advice. The men surveyed tended to delay seeking medical advice for longer than the women do, who do so within one or two years. This indicates that there is a deficit in the data on men which results in a lack of knowledge concerning the possible reasons for infertility.