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Shannon diversity index (SDI) across gestation in pregnant women who received either placebo or probiotic treatment. Results are mean values ± standard deviation (SD) and are expressed in ratios. Comparisons between the probiotic (n = 32) and placebo (n = 34) groups at 13, 28 and 35 weeks of gestation were assessed with Two-Way Repeated Measure Analysis of Variance (ANOVA) followed by the Holm–Sidak post hoc test (p > 0.05).
