Stress Biosensor Linked to IVF Pregnancy Odds

A study presented at ASRM 2026 links physiologic stress readings taken before embryo transfer to pregnancy outcomes in first-cycle IVF patients.

Updated on Nov. 10, 2026 in Pregnancy

Stress Biosensor Linked to IVF Pregnancy Odds

Live Poll

Do you think stress plays a real role in whether IVF succeeds?

Researchers presented findings from 97 women undergoing their first IVF treatment with planned frozen embryo transfer, who wore a biosensor recording heart and brain signals daily until a pregnancy test. An exploratory model predicted pregnancy outcomes with 69% accuracy, though the sample size was modest.

Why it matters

The study adds objective electrophysiologic measurements to a long-running debate over whether stress affects fertility treatment success, moving beyond subjective questionnaires. Its results still require replication in other cohorts before they could guide clinical practice.

The exploratory model identified parasympathetic asymmetry as associated with lower pregnancy odds (odds ratio 0.37; P = .008) in a cohort of 97 women, with 61% achieving intrauterine gestation. Patient age and BMI were not among the top predictive features, and no single feature held significance after correcting for multiple comparisons.

The players

Alice Domar

Alice Domar is a prominent researcher in women's reproductive mental health who plans a randomized controlled trial testing whether real-time stress feedback can improve fertility outcomes.

Jennifer Gordon, PhD

Jennifer Gordon, PhD, is a researcher who directs the Reproductive Mental Health Research Unit at the University of Regina in Saskatchewan, Canada.

The details

Participants wore a biosensor for three to five minutes daily until an initial pregnancy test, recording ECG from the chest and wrist and EEG from the forehead and base of the thumb. Readings taken in the weeks before embryo thaw helped predict outcomes, while post-thaw data offered limited predictive value.

Readings taken weeks before embryo thaw helped predict pregnancy outcomes.
Participants wore the biosensor daily until their initial pregnancy test.
Findings were published by Medscape on November 10, 2026.

Health Landscape

The study moves the decades-old question of whether psychological stress affects fertility treatment from subjective questionnaires toward objective ECG and EEG measurement. Its exploratory design means any shift in clinical practice will depend on the randomized trial Alice Domar has proposed.

For people undergoing IVF, the findings do not yet change treatment, since the model is exploratory and unreplicated. Anyone curious about stress management during fertility care should discuss options with their own clinician rather than relying on this early research.

The takeaway

Stress measurement in fertility care is moving toward objective tools, but this early biosensor work is a starting point rather than a clinical guide. Patients should treat stress findings as a topic to raise with their doctor, not a reason to change care on their own.

What happens next

Alice Domar plans a randomized controlled trial assessing whether real-time stress feedback can improve fertility outcomes, though no date for that trial has been provided.