Question for all the Mommies!

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I am currently 37 weeks pregnant with my third child. I've heard conflicting reports of whether or not wearing a post-partum girdle after baby is born is beneficial to getting back into shape. Not in shape like fit, but just helping your body get back to a non-pregnant shape. I wore an elastic belt thingy after my first child just to help with the c-section pain, having constant pressure on it really helped. But has anyone wore an actual post-partum girdle and liked the results? They are rather expensive, and I'd rather not get one if it's not worth it.