RELATIONSHIP BETWEEN LITTER SIZE AND PARITY NUMBER WITH GESTATION LENGTH OF SOWS

S. Dimitrov

Abstract: The aim of this study was to evaluate relationship between litter size and parity number with gestation period in sows of JSR hybrid (250 gilts-parity and 702 sows-parity). The mean gestation length were 113.98±1.35 days in primiparous animals and 114.17±1.28 days in multiparous sows.
The results show that the litter size and the parity number had significant effects of the length of sow’s pregnancy. The animals with more piglets at the farrowing had shortest gestation period. The sow with more parities had longest gestation period and number of stillborn piglets in the litter.

Keywords: gestation length; litter size; parity number; sows

Date published: 2017-03-17