Rising piglet weaning age whereas sustaining the reproductive effectivity of the breeding herd relies on the flexibility to stimulate sows to ovulate throughout lactation with out lowering subsequent being pregnant charges and litter sizes. The purpose of this research was to find out if a discount in piglet suckling load, both previous to or instantly after mating in lactation, altered ovarian follicle improvement and elevated embryo survival to day 30 of gestation.
Strategies: Fifty-nine multiparous Giant White x Landrace sows had been allotted to one in all three remedies; litter measurement maintained at 11 piglets (management); litter measurement lowered to seven piglets on day 18 of lactation (cut up wean); or litter measurement lowered to seven piglets at expression of lactation oestrus (oestrus cut up wean).
Outcomes: The share of sows that expressed lactation oestrus didn’t differ between remedies (79.7 %) and cut up weaning had minimal results on ovarian follicle improvement. Being pregnant charges had been larger for cut up wean and oestrus cut up wean sows, in comparison with management sows. Embryo survival to day 30 of gestation was larger for cut up wean sows (73.7 %) in contrast with management (56.4 %) and oestrus cut up wean sows (49.5 %).
Conclusion: In abstract, weaning a portion of the litter previous to mating in lactation improved being pregnant charges and embryo survival.
Weaver AC, Sort KL, Herde PJ, van Wettere WHEJ. Break up weaning improves being pregnant fee and embryo survival in sows mated in lactation. Animal Replica Science. 2024; 263: 107440. https://doi.org/10.1016/j.anireprosci.2024.107440.
