highly significantp < 0.0001
Strong and highly significant positive correlations were observed between IVS volume and both gestational age (Pearson’s r = 0.891, p < 0.0001; Spearman’s ρ = 0.920, p < 0.0001) as well as estimated fetal weight (Pearson’s r = 0.860, p < 0.0001; Spearman’s ρ = 0.927, p < 0.0001).