[Calculation of the plausibility of paternity with blood group results using gene frequencies of foreign populations. I. Formulas for the manual computation of Y/X values (author's transl)].

Formulas for the computation of the Y/X likelihood ratio will be given when in view of a biostatistical evaluation of blood group findings frequencies other than Central European ones should be used for all participants concerned. The given formulas are applicable to all common blood group systems and factors currently used in blood group expertises, except the Rh and HL-A systems which are too complex for simple arithmetic formulas.