Computer-based genetical register <<GENREG>> allows to carry out a pro
phylactic medical examination for families with children, having hered
itary diseases, multifactorial pathology and congenital developmental
defects of various nature, and also epidemiological examination. Autom
ated consultative system for prelaboratorial diagnosis of genetically
determined diseases after the phenotypical manifestations <<DIAGEN>> a
llows to identify up to 1200 nosologic units; diagnostic value (or wei
ght) of the signs according to physician's evaluation is taken into co
nsideration. The system sorts out a narrow differetial-and-diagnostic
row and information about specific laboratorial and functional changes
for every selected diagnosis. Efficiency of the system is over 94% (a
fter the next laboratorial findings). The results of computer diagnosi
s and final physician's diagnosis, and also questionnaire of a child a
re stored in archives (files) of the <<(DIAGEN>> system. Both of the s
ystems are realized on PC/AT IBM-compatible computer.