Anything that helps during pregnancy such as body pillows or whatever, means a lot to the mother-to-be.  Our daughter is pregnant with their third child and thankfully doesn’t have trouble sleeping.  I remember with both my pregnancies, however, that it was hard to get comfortable at night during the last couple of months.  We had a waterbed during my second pregnancy and that was so awesome and helped tremendously.  I also had a body pillow which helped a lot.  Whatever discomfort is experienced during sleeping, though, is quickly forgotten once the precious bundle of joy arrives!