a sow
A female pig that has given birth is called a sow.
A young female pig is called a "gilt." This term is used specifically for a female pig that has not yet had piglets. Once she gives birth, she is referred to as a "sow."
A sow is a female pig and she gives birth to piglets (piglets are baby pigs) and a bore is a male pig.
If you mean what is a female pig called it is a sow
farrowing
A mature female pig is called a sow, a young pig that has not given birth or has yet to reach maturity is called a gilt.
A unaltered male pig is called a boar, an altered male pig is a barrow. A female pig that has not given birth is called a gilt and a female pig that has given birth is called a sow. Baby pigs are piglets collectively.
A female pig is called a gilt from birth through when she has a litter of piglets, then she is called a sow.
A female boar is called a sow. Sows are known for their maternal instincts and can give birth to litters of piglets.
She is a Gilt, once she has given birth to her first litter, she will be called a sow.
A female pig that has not yet given birth to piglets is called a gilt.
A pig that is young and is a female is called a pig.