Postural sway assessment.

FO–standing on firm surface, eyes open; FC–standing on firm surface, eyes closed; CO–standing on complian surface, eyes open; CC–standing on compliant surface, eyes closed; NP–no pain; PPGP–pregnancy related pelvic girdle pain; SD–standard deviation; p–p value; p 2NP– 3NP–p value between second trimester no pain group and third trimester no pain group; ML–medio lateral; AP–antero posterior; * indicates a significant difference.

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