A gestation crate is a confined housing system used for pregnant sows in the pork industry. These crates are designed to restrict the movement of the animal, allowing for easier monitoring and management during pregnancy. Typically, they are made of metal and provide just enough space for the sow to stand up and lie down. The use of gestation crates has been a topic of debate due to concerns about animal welfare. Critics argue that the confinement can lead to physical and psychological stress for the animals, while supporters claim they help ensure the health and safety of both the sows and their piglets.