What does amniotic fluid look like?

Amniotic fluid looks like water with a slight yellow tint, according to the National Institutes of Health MedlinePlus website. A pregnant woman at full term, or 40 weeks gestation, has between 600 milliliters and 800 milliliters of amniotic fluid.

Amniotic fluid is mostly transparent. It serves as environmental control within the uterus for a fetus during pregnancy, both in humans and in other mammals. The fetus floats within the fluid and uses it for respiration. The fetus inhales and exhales the fluid as if it were air. Amniotic fluid also cushions the fetus from outside forces, such as movement, and keeps the temperature of the uterus constant.