Maternal Prenatal Perceived Stress Shapes Maternal–Fetal Cardiac Coupling: Insights from Nonlinear Recurrence Analysis
Maternal Prenatal Perceived Stress Shapes Maternal–Fetal Cardiac Coupling: Insights from Nonlinear Recurrence Analysis
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Date
2026
Authors
Eric Alonso Abarca-Castro, 0000-0002-2029-3790
José Javier Reyes-Lagos, 0000-0001-5361-5007
Ana Karen Talavera Peña , 0009-0003-3256-4388
Claudia Lerma, 0000-0002-4679-7751
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Publisher
Universidad Autónoma Metropolitana. Unidad Lerma
Abstract
Description
This repository contains anonymized maternal and fetal RR interval time series derived from abdominal maternal – fetal ECG recordings acquired with the Monica AN24 monitor during pregnancy. The dataset includes interpolated maternal RR (mRR) and fetal RR (fRR) series obtained from the stimulation-free PRE baseline window, corresponding to approximately the first 5 minutes of each recording. Participants were recorded at rest, and files are organized according to exploratory prenatal perceived stress groups: LOW, MODERATE, and HIGH.Maternal prenatal perceived stress was assessed using the 10-item Perceived Stress Scale (PSS-10). The stress categories were used only as descriptive stratification levels and should not be interpreted as diagnostic clinical cutoffs. All files were de-identified and renamed using anonymous participant codes.The RR series were preprocessed by removing missing, non-positive, and implausible intervals, reconstructing time axes from cumulative RR intervals, applying artifact correction, and resampling the maternal and fetal RR signals to a uniform 4 Hz grid using cubic spline interpolation. These preprocessed time series were used to compute linear heart rate variability indices, recurrence plots, cross-recurrence analyses, and related nonlinear metrics. The repository also includes MATLAB scripts and derived outputs required to reproduce the reported analyses and figures.
Keywords
MEDICINA Y CIENCIAS DE LA SALUD