Until recently, I have never especially worried about growing old. Although noting that my doctors, for example, keep getting younger, I had assumed that I could keep up with these youngsters. Recently, however, I saw an ad for a videotape on "Amniocentesis A Parent's Choice." The tape was prepared "in conjunction with a team of prenatal experts." I have spent threescore plus years trying desperately to become an expert at something, anything, and now I see that some people achieve this status before birth. It's not fair.