Table 1.

Summary of different EHG features and obstetric data.

EHG Temporal Parameters	EHG Spectral Parameters	EHG Non-Linear Parameters	Obstetric Data
Peak-to-peak amplitude	DF1 DF2 H/L Ratio Deciles [D1-D9] Teager Energy	Binary Lempel-Ziv Multistate Lempel-Ziv (n = 6) Sample Entropy Spectral Entropy Fuzzy Entropy Time reversibility SD1 SD2 SD1/SD2	Cervical length Gestational age at moment of recording Maternal age Gestations Parity Abortions