Reproduction in mammals is a cycle, what you do during lactation has impact on the future and what happens in the current cycle is impacted by the choices made before. In pig production, sow management during lactation is key as it will condition the ability of piglets to grow fast and healthy. Sow are facing many challenges, among them, the period between weaning and insemination is very short, therefore, lactation needs to be managed very carefully and first comes the feed.