Seasonal infertility in pigs

Area of Science:

• Veterinary Science
• Animal Reproduction
• Swine Husbandry

Background:

• Seasonal infertility is a recognized issue in intensive pig production.
• Understanding oestrus cycle returns is crucial for reproductive efficiency.

Purpose of the Study:

• To investigate the timing and patterns of oestrus returns in sows experiencing seasonal infertility.
• To identify factors contributing to prolonged intervals between mating and detectable oestrus.

Main Methods:

• Retrospective analysis of infertility data from a large piggery.
• Prospective observation of sow oestrus behaviour following mating.

Main Results:

• A significant increase in sows returning to oestrus was observed at 22-37 and 44-53 days post-mating.
• The majority of affected sows returned to oestrus within the fourth or fifth week.
• Undetected oestrus cycles in some sows led to delayed detection and prolonged intervals.

Conclusions:

• Seasonal infertility in pigs is characterized by specific patterns of oestrus returns.
• Failure to detect oestrus behaviour contributes to extended infertility periods.
• Further research into oestrus detection methods may improve management of seasonal infertility.