A number of feeding strategies have been used in attempts to improve performance of progeny born to primiparous sows. This project aimed to determine the best level of conjugated linoleic acid (CLA) inclusion in a top dress for primiparous sows, in order to achieve the best commercial outcomes from this feeding strategy. It also aimed to determine the best time for feeding in late gestation and/or lactation to achieve these improvements. The outcomes of this project have shown that CLA can be included in primiparous sow diets before farrowing using a top dress to improve progeny survival around birth and increase sow and litter performance in lactation.