The informative and analytical data for the reasons of pathologic deliveries of sows of different age and disorders of delivery process dynamics stipulated by weak or excessive throes has been presented in the research. Modern techniques of work on the pig farms have been researched according to the season.

LLC “AX” during 2012 registered 153 cases of pathologic deliveries of sows including 47 30,71 % in winter, 33 (21,56 %) in spring, 43 (28,1 %) in summer and 30 (19,6 %) in autumn. The main reasons for pathologic deliveries were disorders of dynamics of delivery process (53 cases), pathology of birth canals (37 cases), pathology of fetal development (43 cases) and wrong relation of fetus to birth canals (20 cases). General analysis doesn’t include cases of placenta delay in sows – the pathology of the third delivery stage.

The results of studying the disorders of delivery process dynamics according to the season, show the fluctuation of the results from 18,87 (10) in autumn and spring to 33,96 %(18) cases in winter; pathology of birth canals from 18,92 (7) in autumn and spring to 32,43 % (12) cases in summer; pathology of fetal development from 20,93 % (9) in autumn and spring to 30,23 % (13) cases in winter; wrong relation of fetus to birth canals from 20,0 % (4) in summer and autumn to 35,0 % (7) cases in spring.

The results of studying the running number of farrowing show the fluctuation of the disorders of delivery process dynamics number from 6 (11,32 %) – with 2^nd farrowing to 13 (24,53 %) with the 6^th farrowing; pathology of birth canals from 5 (13,51%) with 3d, 4^th and 5^th farrowing, to 8 (21,62 %) with 1^st farrowing; wrong relation of fetus to birth canals from 1 (5 %) with 4^th farrowing to 5 (25,0 %) with 1^st and 2^nd farrowing.

During 2013, on the pig farms of LLC “AX”, 165 cases of pathologic deliveries have been recorded, among them 49 (29,69 %) in winter, 43 (26,06 %) in spring, 48 (29,09 %) in summer and 25 (15,15 %) in autumn. Number of disorders of dynamics of delivery process varied from 10,64 (5) in autumn to 34,04 % (16) in summer, pathology of birth canals from 22,22 %, 10 cases in winter and 10 in autumn, to 28,89 % (12) in summer; pathology of fetal development from 13,73 % (7) in autumn to 35,3 % (18) cases in winter; wrong relation of fetus to birth canals from 13,64 % (3) in autumn to 36,66 % (8) cases in winter.

The results of studying the running number of farrowing show the fluctuation of the disorders of delivery process dynamics number from 5 (10,64 %) – with 4^th farrowing to 20 (21,28 %) 10 with the 5^th farrowing and 10 with the 6^th; pathology of birth canals from 4 (8,89 %) with 4^th farrowing, to 20,0 % – 9 with 1^st, 9 with 3d and 9 with 4^th farrowing; wrong relation of fetus to birth canals from 2 (9,09 %) with 5^th farrowing to 22,73 % – 5with the 1^st and 5 with the 2^nd farrowing.

LLC “Temp” during 2012 registered 132 cases of pathologic deliveries of sows including 34 (25,75 %) in winter, 32 (24,24 %) in spring, 40 (30,3 %) in summer and 26 (19,69 %) in autumn. Disorders of dynamics of delivery process varied from 15,0 % (6) in autumn to 32,5 (13) in summer; pathology of birth canals from 20,0 % (7) in winter to 34,28 % (12) in summer, pathology of fetal development from 21,22 % − 9 cases in winter and 9 in autumn, and wrong relation of fetus to birth canals – from 4,17 % – 1 case in summer, 1 in spring and one in autumn to 8,33 % (2) in winter.

The results of studying the running number of farrowing in 2012 show the fluctuation of the disorders of delivery process dynamics number from 10,0 % (4) – with the 3d farrowing to 22,5 % (9) with the 6^th farrowing; pathology of birth canals from 11,43 % 4 cases with 3d, and 4 cases with the 4^th farrowing, to 22,86 % 8 cases with 1^st and 8 cases with the 2^nd farrowing; pathology of fetal development from 9,1 % (1) with the 3d farrowing to 27,27 % (9) with the 6^th farrowing; wrong relation of fetus to birth canals from 12,5% 3 cases with 4^th farrowing and 3 cases with 5^th farrowing to 20.83% 5 cases with the 1^st and 5 cases the 6^th farrowing.

During 2013, on the pig farms of LLC “Temp”, 128 cases of pathologic deliveries have been recorded, among them 31 (24,21 %) in winter, 32 (25,0 %) in spring, 45 (35,15 %) in summer and 20 (15,62 %) in autumn. Number of disorders of dynamics of delivery process varied from 16,67 % (7) in autumn to 33,33 % (14) in summer, pathology of birth canals from 10,0 %, 3 cases in autumn and 10, to 40,0 % (12) in summer; pathology of fetal development from 20,59 % (7) in autumn to 32,35 % (11) cases in summer; wrong relation of fetus to birth canals from 13,64 % (3) in autumn to 36,66 % (8) cases in winter.

The results of studying the running number of farrowing in 2013 show the fluctuation of the disorders of delivery process dynamics number from 9,52 % (4) – with the 3d farrowing to 26,19 % (11) with the 6^th farrowing; pathology of birth canals from 3,33 % 1 case with 4^th, to 26,67 % 8 cases with the 5^th; pathology of fetal development from 8,82 % two cases with the 2^nd the 3d farrowing each to 32,35 % (11) with the 6^th farrowing; wrong relation of fetus to birth canals from 4,55 % 1 case with the 2^nd farrowing to 22,73 % 5 cases with the 1^st and 5 cases the 4^th farrowing.

Data of the disorders of delivery process dynamics of sows on pig farms of LLC “AX” and LLC “Temp”, according to the season have been presented in tables 1 and 2.

The main reasons for disorders of delivery process dynamics of sows were stipulated by weak or excessive throes. During 2012-2013 the parameters of the disorders of delivery process dynamics of sows on both farms varied from 15,0 % to 33,34 % in LLC “Temp” and from 10,64 % to 33,96 % in LLC “AX”. The results of studying the running number of farrowing in 2012-2013 in LLC “Temp” from 8,7 % with 3d farrowing to 33,34 % with the 1^st farrowing in 2013, in LLC “AX” from 8,7 % with the 3d farrowing to 26,1 % with the 6^th farrowing in 2012.

Key words: farrowing process, uterus contractions, sows and gilts.