Illness increases with age. All else being equal, an older population has greater needs for health care. This logic has led to dire protections of skyrocketing costs - apocalyptic demography. Yet numerous studies have shown tha aging effects are relatively small, and all else is not equal. Cost...

Birth defects occur in population in 3-5% of births. All those birth defects due to chromosomal errors, hundreds of those due to single genes and many of those due to unknown or multifactoral cause can be detected prenatally. However, it is not feasible to test all pregnancies for all of these...