Replacement gilts represent about 20% of all farrowings on most farms. As such, they are a critical part of the production system, though in many operations all females in the breeding herd are treated similarly. Gilts intended to be used as replacements should be treated as the special animals that they are. After all genetic decisions are made, they should be provided a better nursing environment, more space and separate feeds than their counterparts intended for market. Health should be monitored and actively managed. Through the strategic use of mature boars, the gilt age at puberty should be stimulated early and recorded. They should be mated and managed after mating as parity one females, receiving a different diet than older sows. These steps require extra time, and in some cases greater investment, but the payoff in long term productivity can be great.