Table 2:

Summary of the substantial CTG databases used in the literature is presented in chronological order, which however do not include raw 1D-DUS data.

Study	Access	Subjects	Site	Application
Stroux et al. (2017); Stroux & Clifford (2016)	closed	1163 IUGR and 1163 control cases at 23–42 weeks of gestation	Oxford, UK	FHR analysis markers for the detection of early IUGR
Georgieva et al. (2017)	closed	22,790 women in labor, ≥36 weeks of gestation	Oxford, UK	Using CTG and clinical features to automatically identify the fetuses at risk of intrapartum hypoxia.
(Warrick & Hamilton, 2014)	closed	Intrapartum recordings from 5320 normal cases, 10 cases with neonatal depression and 99 with metabolic Acidosis	United States	discrimination of normal and at-risk populations from fetal HRV.
(Chudáček et al., 2014)	open	552 intrapartum CTG selected from 9164 cases, ≥37 weeks of Gestation	Brno, Czech Republic	Providing an open-access CTG database for research on intrapartum CTG signal processing and analysis.