Fig. 2From: Circadian changes and sex-related differences in fetal heart rate parametersAnalysis of Day: Night Changes in Long Term Variation. Analysis of the day:night change in long-term variation (LTV) showed significant effects of both gestational age (GA) at recording (P = 0.030) and sex (P = 0.029); birthweight (used as a surrogate for weight at recording) did not have a significant additional effect (P > 0.1)Back to article page