Experiment and illusion in reproductive medicine.

The diffusion of medical technology is largely determined by the marketplace demands supported by national and historical contexts. Using the cases of cesarean delivery and newborn intensive care in the United States, this article presents the argument that the interaction of four factors accounts for the rapid diffusion of untested technologies. These factors are economic expansion in an unrestricted market, the vulnerability of the patient population, a social disposition towards emergency medicine, and the vested interest of medical specialists.