When you sleep and put a pillow under your knees, do you grow taller?

If growth's not done. If a teen's growth is not done yet, then he will get a bit taller. If he sleeps with a pillow anywhere, he will grow taller. If he sleeps without a pillow, he will grow taller. The amount of growth he gets with a pillow will be the same as the amount of growth he gets without a pillow. That means his growth is not related to pillows.