'Senescent convergence' is the observation that, with advancing age, m
ultiple measurements of organ/body size, chemistry or function, reveal
values for the higher percentiles which decrease faster than those of
the lower percentiles. That is, values of the extremes appear to be c
onverging with advanced age. In some cases, the equations for describi
ng this can be modified to include a term that accounts for the percen
tile of the observation. Examples were given of calculating the age at
which values of 2 different percentiles, of the property being measur
ed, become identical ('age at convergence'). Exceptions to senescent c
onvergence, such as related to diseases like osteoporotic vertebral fr
actures, were mentioned. It was noted that the curves of senescent con
vergence resembled the inverse of those of postnatal growth.