Sigmoid arteries are small blood vessels that branch off from the uterine arteries. They play a crucial role in supplying blood to the uterus, particularly during pregnancy. These arteries have a unique, curved shape that allows them to accommodate the changes in the size and position of the uterus as it expands. These arteries are essential for providing oxygen and nutrients to the developing fetus. They also help in the removal of waste products from the uterine tissue. Proper functioning of the sigmoid arteries is important for maintaining healthy pregnancy outcomes and supporting overall reproductive health.