What is becoming evident is that both fat and lean are essential tissues for reproduction and the objective of the feeding program for replacement gilts should be to manipulate the body composition of the gilt to ensure that adequate reserves of these tissues are present at first mating 显而易见，脂肪和瘦肉都是保持良好繁殖性能必须的体组织，同时也是后备母猪饲喂目标：控制青年母猪的体组成，确保初配时有脂肪和瘦肉沉积。
