Which term describes a female pig that has not yet had a litter of piglets?

The term that refers to a female pig that has not yet had a litter of piglets is "gilt." This term specifically designates young female pigs that are typically under one year of age and are yet to farrow, meaning they have not produced offspring. It highlights a developmental stage in the life cycle of pigs, particularly in breeding contexts where distinguishing between reproductive statuses is essential for management and breeding decisions.

On the other hand, a "sow" refers to a mature female pig that has had at least one litter. A "barrow" is a male pig that has been castrated, while "pig" is a general term that can refer to any member of the species, regardless of age or gender. Understanding these terms is crucial for anyone studying swine production and management.