In response to concerns among internists following the 1987 internal medicine match, this report compares internal medicine trainees with those in other specialties since 1972, describes their paths through the internal medicine "pipeline," and documents their distribution and continuation rates in residency and subspecialty fellowship programs. It is based on the National Study of Internal Medicine Manpower, 1987-1988. Between 1972 and 1986 the number of trainees in internal medicine doubled, and the percentage of trainees in internal medicine grew from 20% to 25%, while the percentage in surgical specialties declined from 28% to 19%. The numbers of women and foreign medical school graduates training in internal medicine have continued to increase, but minority representation has stabilized. Women and minorities have lower continuation rates into fellowships, and distinctive patterns of subspecialization are found among women, minorities, and foreign medical school graduates.