AI Insight
This study analyzed nocturnal heart rate and breathing patterns in 2,504 first-time pregnant women during their first trimester to predict later pregnancy complications. Researchers found that specific abnormalities in the coupling between heart rate and respiration were associated with gestational diabetes mellitus and fetal macrosomia (abnormally large babies), but not with preeclampsia or preterm birth after statistical correction. The cardiorespiratory coupling patterns were measured using home sleep testing equipment between 6-13 weeks of pregnancy.
Why it matters
If validated through peer review, this approach could enable early identification of pregnancies at risk for gestational diabetes and macrosomia using non-invasive home sleep monitoring. Early detection could allow for timely interventions to improve maternal and fetal outcomes, though the clinical utility requires further validation in independent studies.
Understand the Science
⚠️ Preprint – Noch nicht peer-reviewed
Dieser Artikel wurde noch nicht von unabhängigen Experten begutachtet. Die Ergebnisse sind vorläufig und sollten mit Vorsicht interpretiert werden.
We tested whether direction-specific nocturnal cardiorespiratory coupling (CRC) in the first trimester differed in pregnancies that later developed obstetric complications. The analysis included 2504 nulliparous women from the nuMoM2b cohort with valid level 3 home sleep recordings at 6-13 weeks’ gestation. Bidirectional CRC between RR intervals and abdominal respiratory effort was quantified using bivariate phase-rectified signal averaging in consecutive 5-min segments. Coupling strength, local transition dynamics, and waveform irregularity were summarized by nightly mean and standard deviation. Associations with gestational diabetes mellitus (GDM; n = 111), preeclampsia (n = 149), preterm birth (n = 192), and fetal macrosomia (n = 186) were examined using proportional-odds models with CRC feature quintile as the ordered outcome. Models included all four complications simultaneously and adjusted for maternal age, pre-pregnancy body mass index, race and ethnicity, gestational age at recording, relevant medical and family history, medication use, and apnea-hypopnea index >5 events/h. Holm correction was applied across outcomes. GDM was associated with lower respiration-to-heart rate coupling strength (cumulative odds ratio, 0.45; 95% CI, 0.31-0.64; P < 0.001) and shallower slope at the anchor point (0.63; 0.45-0.89; P = 0.03). Fetal macrosomia was associated with lower within-night variability in heart rate-to-respiration waveform irregularity (0.59; 0.45-0.77; P < 0.001). No associations with preeclampsia or preterm birth remained significant after correction. Direction-specific differences in nocturnal CRC were detectable in the first trimester in pregnancies that later developed GDM or resulted in fetal macrosomia.