The gestation period for a domestic pig, which is the length of time a female pig is pregnant, is typically around 114 days, or approximately 3 months, 3 weeks, and 3 days. During this time, the female pig, also known as a sow, will carry and develop her litter of piglets in her uterus. The number of piglets in a litter can vary depending on the breed of the pig, but the average litter size is around 8-12 piglets. After the gestation period, the sow will give birth to her piglets, and she will nurse and care for them until they are weaned and able to eat solid food on their own, which typically occurs around 3-4 weeks of age.