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NCT06919692NARecruiting

Maternal Left Lateral Position in Fetal Growth Restriction

University of Colorado, Denver

Start Date

7/28/2025

Completion Date

12/3/2026

Summary

The goal of this clinical trial is to learn if maternal left-lateral positioning in pregnancy works to treat fetal growth restriction. This study will also help us learn about the effects of left-lateral positioning on maternal metabolomics, maternal mental health, fetal cardiac function, and delivery outcomes. The main questions it aims to answer are: * Does maternal left-lateral position in a pregnancy with fetal growth restriction improve the baby's growth? * How are maternal metabolomics, delivery outcomes, maternal mental health, and fetal cardiac function impacted by maternal left-lateral position? Researchers will compare the intervention group to pregnancies with fetal growth restriction that receive standard of care (without left-lateral positioning) to see if left-lateral position improves fetal biometry in fetal growth restriction. Participants will: * Practice left-lateral position every day for 4 hours (cumulatively) with 10-mins stretching after every hour of left-lateral position, or continue to receive standard of care * Visit the clinic once after 4 weeks for a follow-up research visit, and at the time of delivery Tracking of the physical activity and adherence to left-lateral position at home in intervention group A will be done through a fitbit (smart watch) given during enrollment. A fitbit will also be given to participants in intervention group B, receiving standard of care, to monitor their physical activity trends at home.

Eligibility Criteria

Age Range: 18 years to 65 years

Inclusion Criteria: * Pregnant persons between 18 - 65 years of age, with a diagnosis of fetal growth restriction, with an estimated fetal weight less than tenth percentile * Participants with a singleton pregnancy between 24- and 34-weeks' gestational age * Participants with fluency in English or Spanish language Exclusion Criteria: * Patients with a known history of deep vein thrombosis, pulmonary embolism, or hypercoagulability disorder * Patients with a pre-pregnancy BMI greater than 40 * Pregnancy with severe abnormality in umbilical artery Doppler flow, including absent end-diastolic flow (AEDF) and reverse end-diastolic flow (REDF) * Patients receiving anticoagulation therapy * Pregnancy with suspected chromosomal anomalies or a multifetal pregnancy * Patients with an active smoking status during pregnancy

Interventions

BEHAVIORAL

Left lateral recumbent positioning

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Conditions

Fetal Growth Restriction

Locations

UCHealth Prenatal Diagnosis and Genetics Clinic - Anschutz Medical Campus

Aurora, Colorado 80045

United States

CU John C. Hobbins Perinatal Center

Denver, Colorado 80202

United States