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Fetal HR and HR variability (mean ± SE) for each exposure group across AM/pre-dose and PM/post-dose fetal assessments for (A) basal fetal HR, (B) short-term variability, and (C) episodes of high fetal HR variability (post hoc test significance levels: *p < 0.05, **p < 0.01, ***p < 0.001).
