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(a,b) Levels of systemic inflammatory mediators at baseline (B), mid-pregnancy (MP) and delivery (D) in experimental animals stratified into clinical presentation at baseline (H: health; G: gingivitis; P: periodontitis). The bars denote the group means and the vertical brackets enclose 1 standard error of the mean. The asterisk (*) denotes significantly different from other time-points at least at P < 0·05.
