Fetal electrocardiograms, direct and abdominal with reference heart beats annotations

B1_Pregnancy_dataset The B1 pregnancy signal dataset consists of 10 records marked "B1_Pregnancy_X" (where X is a record number), each containing four files (duration of signals: 20 minutes, sampling frequency: 500 Hz). In the binary file "B1_abSignals_X.ecg" saved in the LabView format there are four abdominal signals after preliminary filtering, and four indirect FECG signals after suppressing the interfering MECG by means of subtraction of maternal P-QRS-T complex pattern and first derivative of the QRS complex. Additionally, all the signals were saved in the text file "B1_abSignals_X.txt". The text file "B1_Maternal_R_X.txt" contains information (expressed as a sample number) on the fiducial points that indicate the locations of maternal QRS complexes (R-waves) in abdominal signals. The file "B1_Fetal_R_X.txt" contains information on the fiducial points for fetal QRS complexes in FECG signals. The fiducial points for FECG have been verified by clinical experts and therefore each point has a reliability flag associated. When the flag equals 0, the fetal R-wave position could not be verified by an expert due to high level of interferences, the value 1 means that the R-wave position has been correctly verified. B2_Labour_dataset The labour signals dataset B2 consists of 12 records marked "B2_Labour_X", where X is a record number, each containing five data files. In the binary file "B2_abSignals_X.ecg" saved in the LabView format there are four abdominal signals after preliminary filtering, and four FECG signals after suppression of interfering MECG (signal duration: 5 minutes, sampling frequency: 500 Hz). The binary file "B2_dFECG_X.ecg" saved in the same format contains a direct FECG signal (raw and after preliminary filtering), registered simultaneously from a fetal head (signal duration: 5 minutes, sampling frequency: 1 kHz). All signals were also available in the text files marked as "B2_abSignals_X.txt" and "B2_dFECG_X.txt", respectively. The text file "B2_Maternal_R_X.txt" contains information (as a sample number) about fiducial points indicating the locations of maternal QRS complexes (R waves) in abdominal signals. The text file "B2_Fetal_R_X.txt" comprises information about fiducial points that indicate the locations of fetal QRS complexes in the direct FECG signal, verified by clinical experts.