The aim of this thesis was to analyze the losses of piglets in pig utility breeding. On the selected farm was made the following experiment: for 4 hybrid combinations was assessed a total of 117 litters of sows. There were monitored basic statistical characteristics (number of all born piglets, number of live born and also number of weaned piglets). The effect of hybrid combination, the litter order and boar impact were evaluated for them. The best results in number of all born piglets (11.00 pc) were achieved for the hybrid combination number 2. The highest number of live born and surviving piglets (10.6 pc and 10.4 pc) was for the hybrid combination number 4. The lowest results in all measured categories (10.08 pc, 9.9 pc and 9.2 pc) were achieved for the hybrid combination number 1. The highest number of all born piglets per litter order for all the hybrid combinations was achieved at the fifth litter order. The highest number of live born and surviving piglets was at the third litter. The lowest number of all born piglets was at the tenth litter. At the eighth litter was the lowest number of live born and surviving piglets. The highest number of all born piglets was recorded with the boar AEG 26, that belongs to the hybrid combination number 1. Moreover that boar had the highest number of live born piglets. However, the highest average number of all weaned piglets is achieved with the boar HYB 140 from the hybrid group number 2. The lowest average number of all born, live born and weaned piglets is with the boar ALT 163, that also comes from the hybrid combination number 1.