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This database contains uterine magnetomyographic (MMG) signals recorded using the 151 channel SARA (SQUID Array for Reproductive Assessment) system installed at UAMS, Little Rock, USA. Recordings are taken from 25 subjects who presented themselves in the Triage unit of Labor and Delivery and were undergoing monitoring and evaluation of labor. All subjects were asked to lean forward and sit comfortably with the sensor array covering their pregnant abdomens. The duration of a recording was typically around 20 minutes.
To obtain the final MMG signals, the original 250Hz data was downsampled to 32 Hz, bandpass filtered (0.1-1 Hz) to attenuate the maternal and fetal cardiac signals, and notch filtered (0.25-0.35 Hz) to suppress the prominent maternal breathing around 0.33 Hz. Furthermore, segments with maternal movement were excluded. Each final recording in this database contains 147 to 148 channels and lasts between 10 and 20 minutes.
The data was preprocessed in MATLAB and converted to WFDB format using the mat2wfdb function from the PhysioToolkit software. File names in the database are of the form ###_*GA, where ### is the ID of the participant, and *GA refers to gestational age in weeks and days (ie. 38w0d). Header files contain channel labels and the following clinical information:
- Cervical dilation (dilation cm)/(effacement %)/(station)
- Days to delivery after SARA recording.
- Race
- BMI
- Gestation Period (weeks+days)
The sensorpositions record contains x, y, and z coordinates of the SARA array's 149 different channels present in the database. Refer to SARAarray.eps or SARAarray.tif for diagrams of the apparatus.
Relevant Publications
Name Last modified Size Description
Parent Directory - 204_37w6d.dat 2016-03-02 19:26 10M digitized signal(s) 234_37w5d.dat 2016-03-02 19:26 9.8M digitized signal(s) 210_37w3d.dat 2016-03-02 19:26 9.8M digitized signal(s) 209_37w3d.dat 2016-03-02 19:26 9.8M digitized signal(s) 232_37w6d.dat 2016-03-02 19:26 9.5M digitized signal(s) 230_38w5d.dat 2016-03-02 19:26 9.5M digitized signal(s) 227_40w3d.dat 2016-03-02 19:26 9.5M digitized signal(s) 224_39w0d.dat 2016-03-02 19:26 9.5M digitized signal(s) 222_38w0d.dat 2016-03-02 19:26 9.2M digitized signal(s) 221_37w0d.dat 2016-03-02 19:26 9.2M digitized signal(s) 211_37w2d.dat 2016-03-02 19:26 9.2M digitized signal(s) 207_38w2d.dat 2016-03-02 19:26 9.2M digitized signal(s) 202_38w0d.dat 2016-03-02 19:26 9.2M digitized signal(s) 233_39w3d.dat 2016-03-02 19:26 8.9M digitized signal(s) 237_40w2d.dat 2016-03-02 19:26 8.9M digitized signal(s) 229_39w1d.dat 2016-03-02 19:26 8.4M digitized signal(s) 226_38w0d.dat 2016-03-02 19:26 8.4M digitized signal(s) 203_37w3d.dat 2016-03-02 19:26 8.1M digitized signal(s) 218_38w0d.dat 2016-03-02 19:26 7.6M digitized signal(s) 213_37w4d.dat 2016-03-02 19:26 7.6M digitized signal(s) 212_39w0d.dat 2016-03-02 19:26 7.6M digitized signal(s) 205_40w1d.dat 2016-03-02 19:26 7.6M digitized signal(s) 214_37w3d.dat 2016-03-02 19:26 7.0M digitized signal(s) 225_37w6d.dat 2016-03-02 19:26 6.2M digitized signal(s) 235_39w0d.dat 2016-03-02 19:26 5.7M digitized signal(s) figure2.png 2016-03-03 18:29 64K figure1.png 2016-03-03 18:29 54K sensorpositions.hea 2016-03-02 19:27 9.0K header file 205_40w1d.hea 2016-03-02 19:27 8.3K header file 218_38w0d.hea 2016-03-02 19:27 8.3K header file 230_38w5d.hea 2016-03-02 19:27 8.3K header file 203_37w3d.hea 2016-03-02 19:27 8.3K header file 229_39w1d.hea 2016-03-02 19:27 8.3K header file 213_37w4d.hea 2016-03-02 19:27 8.3K header file 234_37w5d.hea 2016-03-02 19:27 8.3K header file 226_38w0d.hea 2016-03-02 19:27 8.3K header file 210_37w3d.hea 2016-03-02 19:27 8.3K header file 233_39w3d.hea 2016-03-02 19:27 8.3K header file 232_37w6d.hea 2016-03-02 19:27 8.3K header file 211_37w2d.hea 2016-03-02 19:27 8.3K header file 204_37w6d.hea 2016-03-02 19:27 8.3K header file 209_37w3d.hea 2016-03-02 19:27 8.3K header file 227_40w3d.hea 2016-03-02 19:27 8.3K header file 222_38w0d.hea 2016-03-02 19:27 8.3K header file 212_39w0d.hea 2016-03-02 19:27 8.3K header file 207_38w2d.hea 2016-03-02 19:27 8.3K header file 237_40w2d.hea 2016-03-02 19:27 8.3K header file 221_37w0d.hea 2016-03-02 19:27 8.2K header file 224_39w0d.hea 2016-03-02 19:27 8.2K header file 225_37w6d.hea 2016-03-02 19:27 8.2K header file 235_39w0d.hea 2016-03-02 19:27 8.2K header file 214_37w3d.hea 2016-03-02 19:27 8.2K header file 202_38w0d.hea 2016-03-02 19:27 8.2K header file SHA256SUMS 2016-03-02 19:51 4.3K SHA1SUMS 2016-03-02 19:51 3.0K MD5SUMS 2016-03-02 19:51 2.6K sensorpositions.dat 2016-03-02 19:26 894 digitized signal(s) RECORDS 2016-03-02 19:36 266 list of record names DOI 2019-02-06 12:53 19
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