Management factors associated with sow reproductive performance after weaning

Area of Science:

• Animal Science
• Reproductive Biology
• Swine Production

Background:

• Sow reproductive efficiency is crucial for optimal pig herd performance.
• Prompt re-conception post-weaning is essential for maximizing litter production.
• Understanding herd and management factors influencing sow reproductive success is vital.

Purpose of the Study:

• To identify herd and management factors associated with sow reproductive performance after weaning.
• To analyze the impact of specific practices on weaning-to-oestrous interval (WEI) and repeat breeder (RB) rates.
• To provide data-driven recommendations for improving sow reproductive outcomes.

Main Methods:

• A cross-sectional study involving 76 commercial pig herds in Belgium.
• Data collection through questionnaires on sow management practices at weaning.
• Analysis of herd reproductive data, including WEI and RB percentages, using general linear mixed models.

Main Results:

• Separated feeding of gilts from 60 kg was linked to a shorter WEI (5.54 vs 7.28 days).
• Lower RB percentages were associated with separating newly weaned sows from gestating sows (7% vs 12%).
• Using semen less than 4 days old and twice-daily oestrus stimulation also reduced RB rates (7-9% and 8% vs 14% and 11%, respectively).

Conclusions:

• Specific management practices significantly influence sow reproductive parameters like WEI and RB.
• Implementing strategies such as tailored gilt feeding, appropriate housing, consistent oestrus stimulation, and optimal semen usage can enhance reproductive performance.
• These easily implementable practices offer practical solutions for pig producers to improve sow rebreeding success and overall herd productivity.