Figure 4
From: Is there a differential impact of parity on factors regulating maternal peripheral resistance?

Comparison of linear dynamics (log RMSSD, log LF, log HF, and log TP) between nulliparous (▪) and multiparous (□) women throughout pregnancy. HF, high frequency; LF, low frequency; RMSSD, root mean square of the successive differences; TP, total power. Results are expressed as mean±s.d. *P<0.05 nulliparous women vs. multiparous women; **P<0.05 for comparisons between trimesters.