In this paper, we investigated the effects of hyperthermic stress, involved in the intrauterine
and early postnatal period, in the blood like the inner space, in fact in erythrocytes, hemoglobin,
hematocrit and leucocytes.
For this purpose we used albino laboratorial rat of the Wistar kind.
The testing results led us to conclusion about the harmful influence of the hyperthermic stress
in all of the investigated parameters, especially if it is applied in continuity. It’s manifested by
increased number of erythrocytes and hematocrit value and change in the number of the leukocytes,
which in state of hyperthermic stress, is reduced. Changes occur in relation between lymphocytes and
neutrophilic leukocytes. Treatment in the intrauterine life has very small negative influence
