Relationship between piglets' survivability and farrowing kinetics in hyper-prolific sows

Area of Science:

• Veterinary Medicine
• Animal Science
• Reproductive Biology

Background:

• Genetic selection for increased litter size in sows leads to prolonged farrowing and low birth weight piglets.
• Hyperprolific sows face challenges including stillbirths and neonatal mortality.
• Understanding farrowing kinetics is crucial for improving piglet survivability.

Purpose of the Study:

• To evaluate the relationship between farrowing kinetics and piglet survivability in hyperprolific sows.
• To identify factors influencing piglet mortality and stillbirth rates.
• To provide insights for improving neonatal care and reducing losses in large litters.

Main Methods:

• Observational study involving 58 sows and 1190 piglets.
• Monitoring of the entire farrowing process, recording inter-piglet birth interval, birth order, and birth weight.
• Measurement of colostrum yield and intake, and piglet mortality at 24 hours and until weaning.

Main Results:

• Farrowing duration was positively associated with parity, stillborn, and mummified piglets.
• Piglet mortality at 24 hours was negatively affected by birth weight and positively by cumulative birth interval.
• Higher colostrum intake was linked to lower piglet mortality, while longer birth intervals increased stillbirth risk.

Conclusions:

• Reducing farrowing duration is critical for lowering stillbirth rates and neonatal mortality in hyperprolific sows.
• Special attention to lighter piglets is necessary to enhance colostrum intake and minimize mortality.
• Optimizing farrowing management and neonatal care can significantly improve piglet survival outcomes.