I was absolutely huge when I was carrying my children. Both times I put on about 4 stone in weight, & the only time i could get comfy in bed, was if I laid on my side with a bolster cushion against me. It was no good trying to lie on my back, otherwise I couldn't get up again! However, shortly before having my first child, I was told he was in the breech position, & an old widwife passed on a tip. She told me to lie on my back for 20 minutes, with my legs up against a wall at a 90 degree angle. I did this twice a day for a week, and my baby was born in the normal position, with no problems at all.