What reproductive effect might occur if sows are fed corn contaminated with mycotoxins?

Feeding sows corn contaminated with mycotoxins can lead to fewer sows settling or becoming pregnant after mating due to the negative effects of mycotoxins on reproductive health. Mycotoxins can disrupt hormonal balances and impair ovarian function, which may lead to reduced fertility rates. They can create an environment in the reproductive tract that is less conducive to successful conception, thus impacting overall reproductive performance. Mycotoxins often have toxic effects on both the sow and the developing embryos, which can hinder the mating process and resulting pregnancy.

This scenario contrasts with the other options, as mycotoxins are unlikely to lead to increased litter sizes, shorter gestation periods, or improved heat cycles. In fact, these conditions are usually associated with optimal health and nutrition, rather than with exposure to contaminants that can compromise reproductive effectiveness.