A male is considered infertile if he doesn't produce, and deliver, enough quality sperm to initiate a pregnancy. Twenty five percent of fertile couples will conceive during one month of unprotected intercourse. These conception rates are averages and will vary between couples. Infertility is divided into two categories. Primary infertility refers to women who have never had a child.
Secondary infertility applies to women who have delivered at least one child.
The incidence of infertility increases as the female ages. These declines reflect the natural aging process and emphasize the need for rapid evaluation and treatment, especially in woman over 35 years of age. The causes of infertility are divided into categories. The failure of healthy gametes to come into close physical proximity, thus preventing fertilization. The inability of the fertilized egg to successfully attach to the uterine lining.