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A lot of flocks have started the process of selecting their replacement ewe lambs for this season and with this in mind we’re joined by Dr Fiona McGovern who shares some of her insights in the area. We start off by discussing some recent findings on the factors influencing ewe longevity and then move on to discuss the genetic component of a number of the key traits that influence production such as: lambing and mothering ability, lameness, mastitis and others. Fiona discusses why a replacement policy should have scope for continual selection and culling during the year and how to use records and simple identifiers to target underperformer or problem sheep in the flock. Fiona also describes the variations she has seen from the detailed recording on maternal traits in the INZAC flock over the past number of years. Finally, Fiona highlights the need to make use of genetic indices when selecting sires for future replacements, particularly when trying to improve flock performance for those hard-to-see traits. For more episodes and information visit the OviCast show page: https://www.teagasc.ie/animals/sheep/ovicast-sheep-podcast/