Maternal Left Lateral Position in Fetal Growth Restriction
NCT ID: NCT06919692
Last Updated: 2025-07-17
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
NA
100 participants
INTERVENTIONAL
2025-07-28
2026-12-03
Brief Summary
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* 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.
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
SINGLE
Study Groups
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Intervention group A
Pregnant persons randomized into this group will be instructed to practice left-lateral recumbent position for a period of 4-hours (cumulatively) daily for 4-weeks after enrollment. The participants will be advised to stretch for 10 mins after every hour of recumbent position. A per-protocol recommendation of mild to moderate intensity exercise 2-3 times a week will be advised. A healthy diet will also be recommended. The activity at home will be recorded via a smart watch.
Left lateral recumbent positioning
Left-lateral position is the recommended position of resting in pregnancy. The participants in the intervention group will be advised to practice this position with an intermittent 10-minute stretching after every hour of resting, with no more than 4-hours of this intervention per day.
Intervention group B
Pregnant persons in this group will continue to receive the 'standard of care', per clinical protocol. A recommendation of mild to moderate intensity exercise 2-3 times a week will be advised. A healthy diet will be recommended. The activity status at home will be recorded via a smart watch.
No interventions assigned to this group
Interventions
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Left lateral recumbent positioning
Left-lateral position is the recommended position of resting in pregnancy. The participants in the intervention group will be advised to practice this position with an intermittent 10-minute stretching after every hour of resting, with no more than 4-hours of this intervention per day.
Eligibility Criteria
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Inclusion Criteria
* 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 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
18 Years
65 Years
FEMALE
No
Sponsors
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University of Colorado, Denver
OTHER
Responsible Party
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Principal Investigators
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Manesha Putra, MD
Role: PRINCIPAL_INVESTIGATOR
University of Colorado Anschutz, Department of Obstetrics and Gynecology
Locations
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UCHealth Prenatal Diagnosis and Genetics Clinic - Anschutz Medical Campus
Aurora, Colorado, United States
CU John C. Hobbins Perinatal Center
Denver, Colorado, United States
Countries
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Central Contacts
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Facility Contacts
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References
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American College of Obstetricians and Gynecologists' Committee on Practice Bulletins-Obstetrics and the Society forMaternal-FetalMedicin. ACOG Practice Bulletin No. 204: Fetal Growth Restriction. Obstet Gynecol. 2019 Feb;133(2):e97-e109. doi: 10.1097/AOG.0000000000003070.
Gardosi J, Madurasinghe V, Williams M, Malik A, Francis A. Maternal and fetal risk factors for stillbirth: population based study. BMJ. 2013 Jan 24;346:f108. doi: 10.1136/bmj.f108.
Lees CC, Romero R, Stampalija T, Dall'Asta A, DeVore GA, Prefumo F, Frusca T, Visser GHA, Hobbins JC, Baschat AA, Bilardo CM, Galan HL, Campbell S, Maulik D, Figueras F, Lee W, Unterscheider J, Valensise H, Da Silva Costa F, Salomon LJ, Poon LC, Ferrazzi E, Mari G, Rizzo G, Kingdom JC, Kiserud T, Hecher K. Clinical Opinion: The diagnosis and management of suspected fetal growth restriction: an evidence-based approach. Am J Obstet Gynecol. 2022 Mar;226(3):366-378. doi: 10.1016/j.ajog.2021.11.1357. Epub 2022 Jan 10.
Baschat AA, Galan HL, Lee W, DeVore GR, Mari G, Hobbins J, Vintzileos A, Platt LD, Manning FA. The role of the fetal biophysical profile in the management of fetal growth restriction. Am J Obstet Gynecol. 2022 Apr;226(4):475-486. doi: 10.1016/j.ajog.2022.01.020.
DeVore GR, Gumina DL, Hobbins JC. Assessment of ventricular contractility in fetuses with an estimated fetal weight less than the tenth centile. Am J Obstet Gynecol. 2019 Nov;221(5):498.e1-498.e22. doi: 10.1016/j.ajog.2019.05.042. Epub 2019 May 30.
DeVore GR, Polanco B, Lee W, Fowlkes JB, Peek EE, Putra M, Hobbins JC. Maternal rest improves growth in small-for-gestational-age fetuses (<10th percentile). Am J Obstet Gynecol. 2025 Jan;232(1):118.e1-118.e12. doi: 10.1016/j.ajog.2024.04.024. Epub 2024 May 21.
Higuchi H, Takagi S, Zhang K, Furui I, Ozaki M. Effect of lateral tilt angle on the volume of the abdominal aorta and inferior vena cava in pregnant and nonpregnant women determined by magnetic resonance imaging. Anesthesiology. 2015 Feb;122(2):286-93. doi: 10.1097/ALN.0000000000000553.
Lee SW, Khaw KS, Ngan Kee WD, Leung TY, Critchley LA. Haemodynamic effects from aortocaval compression at different angles of lateral tilt in non-labouring term pregnant women. Br J Anaesth. 2012 Dec;109(6):950-6. doi: 10.1093/bja/aes349. Epub 2012 Oct 11.
Nelson DB, Stewart RD, Matulevicius SA, Morgan JL, McIntire DD, Drazner M, Cunningham FG. The Effects of Maternal Position and Habitus on Maternal Cardiovascular Parameters as Measured by Cardiac Magnetic Resonance. Am J Perinatol. 2015 Dec;32(14):1318-23. doi: 10.1055/s-0035-1563719. Epub 2015 Sep 16.
Laurin J, Persson PH. The effect of bedrest in hospital on fetal outcome in pregnancies complicated by intra-uterine growth retardation. Acta Obstet Gynecol Scand. 1987;66(5):407-11. doi: 10.3109/00016348709022043.
Palacio M, Mottola MF. Activity Restriction and Hospitalization in Pregnancy: Can Bed-Rest Exercise Prevent Deconditioning? A Narrative Review. Int J Environ Res Public Health. 2023 Jan 13;20(2):1454. doi: 10.3390/ijerph20021454.
Society for Maternal-Fetal Medicine (SMFM). Electronic address: [email protected]; Lauder J, Sciscione A, Biggio J, Osmundson S. Society for Maternal-Fetal Medicine Consult Series #50: The role of activity restriction in obstetric management: (Replaces Consult Number 33, August 2014). Am J Obstet Gynecol. 2020 Aug;223(2):B2-B10. doi: 10.1016/j.ajog.2020.04.031. Epub 2020 Apr 29.
Kovacevich GJ, Gaich SA, Lavin JP, Hopkins MP, Crane SS, Stewart J, Nelson D, Lavin LM. The prevalence of thromboembolic events among women with extended bed rest prescribed as part of the treatment for premature labor or preterm premature rupture of membranes. Am J Obstet Gynecol. 2000 May;182(5):1089-92. doi: 10.1067/mob.2000.105405.
Other Identifiers
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25-0289
Identifier Type: -
Identifier Source: org_study_id
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