SUMMARY Effect of heat stress throught the first and second parities of NZW doe rabbits on some reproductive and physiological traits was evaluated. Fourty four parturitons (22 in each parity) were used in this study. Parturitions in each parity were divided into two main groups, each group of 11 ones. The first group was maintained at 21.9±0.9 °С and 46.1±2.7 RH % (20.8 THI, comfort conditions) and served as a control (C) group. The second one was exposed for about 8 h. to cyclic ambient temperature of 37.1±0.5 °С and 44.8±2.2 RH % (33.2 THI, severe heat stress conditions) from 13:00 to 21:00. Then, the temperature was lowered to the temperature in the rabbitry of control group from 21:00 to 13:00. Results obtained showed that high temperature cuased a significant increase (P
