[The determination of the parameter of Bertalanffy's growth differential equations by means of nonlinear internal regression].

A short survey is given on various parameterized versions of the logistic law of growth and of Bertalanffy's growth differential equations. To examine the validity of these various growth expressions internal nonlinear regressions were performed, and the results of the calculations are presented. The body length growth of man within the embryonic development serves as examples of a growth process. The parameters in the differential equations will be adjusted to the course of the divided central differences calculated from means of measured values of this growth process.