Infertility is a disease of the reproductive system that prevents the conception of children.
Finally, for the pregnancy to continue to full term, the embryo must be healthy and the woman's hormonal environment adequate for its development. When just one of these factors is impaired, infertility can result. Nobody can be blamed for infertility, any more than someone is to blame for diabetes or leukemia. For the remaining one-third of infertile couples, infertility is caused by a combination of problems in both partners or, in about 20 percent of cases, is unexplained. Sometimes, sperm cells are malformed or they die before they can reach the egg.