Can I lay on my back with pillows while pregnant?

It’s said that as long as you’re not sleeping flat on your back, you will be fine. The inferior vena cava is a large vein in the body that carries blood from the lower limbs and organs to the heart. Even if you can sleep at a 20-30 degree angle, this pressure will be relieved significantly. Many people think they have to sleep completely flat on their backs, but this isn’t necessarily true.