Sleeping on the left side is good for blood circulation to the baby. Of course, mothers roll over, but spending more time on your left side than on your right, and very little time on your back is best. Studies show sleeping and resting on your left is a good thing for womb-babies.
But will lying on the left turn a posterior baby to anterior? Unlikely. Will it be good to do anyway? Yes.
Natural birth enthusiasts know the benefits of gravity (in this case, lying on the left) and movement on labor progress. But these aren’t enough when modern lifestyle issues limit the baby’s flexion and position. Spinning Babies® promotes certain exercises and professionals to help bring the pelvis back into balance. Everyone can use a little more balance. But some of us need a little more.
After a set of balancing activities, such as the four myofascial techniques in the website here, and other activities, resting on the left with a pillow between both the knees and the ankles, is a lovely way to rest. Leaning over slightly with the leg supported to prevent a twist in the hip muscles is better.