Background/Aim. The aim of this study was to evaluate pregnancy outcome during the bombing of Yugoslavia in the period from March 24 to June 9, 1999. Methods. A retrospective study included a total of 81spontaneous abortion following XII gestation week, and 1448 deliveries, hospitalized in the regional hospital. The analyzed were: the incidence of spontaneous abortion, Cesarean section, post-term delivery, vaginal delivery following the previous Cesarean section within the period from March 24 to June 9, 1999, and compared to the same periods in 1998 and 2000 by the use of χ² and Kolgomorov-Smirnov tests. Results. Under the conditions of a three-month stress imposed by the bombing, significantly increased were the incidence of spontaneous abortion and vaginal delivery following the previous Cesarean section, while the incidence of Cesarean section and post-term delivery were decreased, but the incidence of perinatal outcome was paradoxically improved. The analysis of findings on admittance revealed that iterative Cesarean section was performed electively, close to the expected term of delivery, and vaginal delivery following the previous Cesarean section mainly two weeks before that term with the admittance finding confirming a high active stage pregnancy. Conclusions. Within the bombing, statistically significantly was increased the percentage of abortions after XII gestation week, and the biological duration of pregnancy was reduced. The reduced duration of pregnancy complete with the accelerated fetal mutation (also caused by the stress) resulted in better perinatal outcome, and statistically significantly lower percentage of Cesarean section.