Table 4.

Post hoc analysis (U = Mann–Whitney test) of the HRV parameter and the fetal behavioral states.

State changes	mHR	SDNN	RMSSD	SDNN/RMSSD ratio	PE
1F–2F	0.057 (U = 1444.0)	0.000 (U = 1.00)	0.000 (U = 406.0)	0.000 (U = 0.002)	0.721 (U = 1717.0)
1F–4F	0.000 (U = 37.0)	0.000 (U = 13.0)	0.000 (U = 128.0)	0.000 (U = 0.101)	0.016 (U = 206.0)
2F–4F	0.000 (U = 67.0)	0.030 (U = 314.0)	0.713 (U = 466.0)	0.042 (U = 0.674)	0.009 (U = 273.5)

Statistically significant p-values are shown in bold type.