In NaPro Technology as an Authentic Treatment for Infertility Dr. Phil Boyle describes the concept of NaPro Technology as a natural technique for solving the problem of infertility while remaining faithful to Catholic social teaching.

NaPro Technology ("Natural Procreative Technology") is a new scientific, holistic system, faithful to Catholic teaching, used in part to treat infertility, miscarriage and gynecologic health problems.  Dr. Boyle talks about the origins of this science, which was pioneered by Dr. Thomas W. Hilgers of the Pope Paul VI Institute and inspired by Pope Paul VI's encyclical, Humanae Vitae.