Temporal trajectories in sleep, temperature trends, cardiorespiratory, and activity metrics measured via Oura Ring during pregnancy: large-scale observational analysis
This peer-reviewed study in JMIR mHealth and uHealth analyzed data from 10,318 pregnancies. Researchers used Oura Ring to trace daily changes from prepregnancy through postpartum. The study mapped clear patterns for term births, preterm births, and pregnancy loss.
The data shows that body temperature trends shift as early as week four. For pregnancies ending in loss, clear physiological signs emerged two weeks early. These continuous insights help clinicians improve prenatal care and support better health outcomes.
“A deeper focus on normative changes can advance maternal-fetal medicine, improve clinical outcomes, and address scientific gaps.”
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