Technical Abstract: Reproductive performance not only relates to an animal’s ability to produce offspring, but to produce it at a proper time interval and provide proper neonatal care and nutrition. The recognition that poisonous plants may have a major impact on reproductive performance is relatively new and not fully realized. Effects on spermatogenesis, oogenesis, libido, fertilization, placentation, embryo-fetal survival, development (birth defects) and growth, postpartum intervals, and neonatal survival and development are all factors affected by poisonous plants.