Which of the following symptoms would indicate a poor reproductive performance in sows?

Irregular heat periods in sows can indeed indicate poor reproductive performance. Sows typically exhibit estrus (heat) in a predictable cycle, usually every 21 days. When their heat cycles are irregular, it can suggest underlying health issues, management problems, or nutritional deficiencies that might affect their fertility.

A consistent and regular estrus cycle is crucial for successful breeding. Irregularities can lead to difficulties in determining the optimal breeding times, which may result in decreased conception rates and lower overall productivity. Therefore, observing irregular heat periods is a significant red flag in swine reproductive management that necessitates further investigation and potential intervention to ensure the reproductive health of the herd.