During what specific period does a sow have high nutrient requirements for lactation?

A sow has high nutrient requirements during peak lactation due to the intense physiological demands placed on her body as she produces milk for her piglets. During this phase, which typically occurs around two to three weeks after giving birth, the need for energy, protein, and essential nutrients significantly increases. The sow’s body must support both her own health and her ability to provide adequate nutrition to her growing offspring. If nutrient needs are not met during this critical time, it can lead to health issues for the sow and inadequate milk supply for the piglets, potentially affecting their growth and survival rates.

While nutrient requirements are also important during gestation and before parturition to ensure a healthy litter and successful delivery, the peak demand for nutrients is specifically during lactation when the sow is actively feeding her litter. After weaning, though the sow's nutrient requirements shift again, they are not as heightened as during peak lactation when milk production is at its most intense level.