The Pope has called on infertile couples to shun artificial procreation, saying such methods are a form of arrogance.
Benedict XVI was speaking at the end of a three-day Vatican conference on diagnosing and treating infertility.
Reiterating Vatican teaching, he called marriage the only permissible place to conceive children.
He also pressed a church ban against artificial procreation. He said infertile couples should resist resorting to any method to try to conceive other than sex between husband and wife.
He said the drive for profit as well as "arrogance" seemed to dominate the field of infertility and warned against what he called the "fascination of artificial procreation technology".