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NCT05868954: MedDiet

Implementation of a Mediterranean Diet Program for Overweight or Obese Pregnant Women in a Low-resource Clinical Setting

Completed NA Results posted Last updated 8 December 2025
What this trial tests

NA trial testing MedDiet Program in Gestational Weight Gain in 41 participants. Completed in 10 July 2025.

Timeline
31 August 2023
Primary endpoint
30 November 2024
10 July 2025

Quick facts

Lead sponsorWake Forest University Health Sciences
PhaseNA
StatusCompleted
Study typeINTERVENTIONAL
Allocationrandomized
Designparallel
Maskingnone
Primary purposeprevention
Enrollment41
Start date31 August 2023
Primary completion30 November 2024
Estimated completion10 July 2025
Sites1 location across United States

Drugs / interventions tested

Conditions studied

Sponsor

Wake Forest University Health Sciences

Who can join

18 and older, female only, with Gestational Weight Gain or Diet, Healthy. Patients with the condition only — healthy volunteers not accepted.

Results — posted to ClinicalTrials.gov

Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.

Diet Adherence Assessment Scores Continuous Primary · week 38

The Routine Healthy Diet Assessment Questionnaire consists of 15 items. Each item is scored as 1 for adherence and 0 for non-adherence, with some items having trimester-specific scoring. The total score is the sum of all items, ranging from 0 (no adherence) to 15 (full adherence). Higher scores indicate better adherence to the routine healthy diet .The MedDiet Assessment Questionnaire consists of 17 items. Each item is scored as 1 for adherence and 0 for non-adherence. The total score is the sum of all items, ranging from 0 (no adherence) to 17 (full adherence). Higher scores indicate better a

GroupValue95% CI
American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program9.07.5 – 10.0
Mediterranean Diet (MedDiet) Program1110.0 – 13.0
Gestational Weight Gain (GWG) Secondary · week 40

Total GWG will be calculated by subtracting the participant's weight (lbs.) at the initial prenatal visit from the weight (lbs.) at time of the delivery or at the last prenatal visit. GWG in the first trimester (6-13 weeks), second trimester (14-26 weeks), and third trimester (27-40 weeks) will also be calculated. Calibrated weight scales will be used at our clinic and at the hospital. Compliance rate of GWG based on Institute of Medicine (IOM) guidelines for overweight and obese women will be compared between the MedDiet and the control group.

GroupValue95% CI
American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program24.07± 10.47
Mediterranean Diet (MedDiet) Program19.54± 8.51
Cardiometabolic Biomarkers - Hemoglobin A1C Levels Secondary · Week 30

Hypothesize that consuming the Mediterranean diet (MedDiet) may be associated with improved cardiometabolic biomarkers during pregnancy. Specifically, MedDiet might help reduce the physiological rise in lipids, enhance insulin sensitivity, and lower markers of subclinical inflammation, such as C-reactive protein (CRP). Pregnancy is usually marked by increased levels of total cholesterol, low-density lipoprotein (LDL), high-density lipoprotein (HDL), and triglycerides, especially in the second and third trimesters, along with increased insulin resistance. This study aims to determine whether Me

GroupValue95% CI
American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program5.105.00 – 5.30
Mediterranean Diet (MedDiet) Program4.904.80 – 5.25
Cardiometabolic Biomarkers - C-reactive Protein (CRP) Levels Secondary · Week 30

Consumption of MedDiet is associated with lower levels of total cholesterol, reduces insulin resistance preventing type 2 diabetes and Gestational diabetes mellitus (GDM), and reduces markers of subclinical inflammation such as C-reactive protein (CRP). Pregnancy is characterized by increased levels of total cholesterol, low-density lipoprotein (LDP), high-density lipoprotein (HDL), and triglycerides, especially in the second and third trimester, and pregnancy is a state of increased insulin resistance. There is limited knowledge about the effect of MedDiet on cardiometabolic biomarkers during

GroupValue95% CI
American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program1.000.40 – 1.50
Mediterranean Diet (MedDiet) Program0.900.45 – 1.90
Cardiometabolic Biomarkers - Triglycerides Secondary · Week 30

Consumption of MedDiet is associated with lower levels of total cholesterol, reduces insulin resistance preventing type 2 diabetes and Gestational diabetes mellitus (GDM), and reduces markers of subclinical inflammation such as C-reactive protein (CRP). Pregnancy is characterized by increased levels of total cholesterol, low-density lipoprotein (LDP), high-density lipoprotein (HDL), and triglycerides, especially in the second and third trimester, and pregnancy is a state of increased insulin resistance. There is limited knowledge about the effect of MedDiet on cardiometabolic biomarkers during

GroupValue95% CI
American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program217.66± 14.21
Mediterranean Diet (MedDiet) Program261.23± 36.27
Cardiometabolic Biomarkers - Glucose Level Secondary · Week 30

Consumption of MedDiet is associated with lower levels of total cholesterol, reduces insulin resistance preventing type 2 diabetes and Gestational diabetes mellitus (GDM), and reduces markers of subclinical inflammation such as C-reactive protein (CRP). Pregnancy is characterized by increased levels of total cholesterol, low-density lipoprotein (LDP), high-density lipoprotein (HDL), and triglycerides, especially in the second and third trimester, and pregnancy is a state of increased insulin resistance. There is limited knowledge about the effect of MedDiet on cardiometabolic biomarkers during

GroupValue95% CI
American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program8682 – 97
Mediterranean Diet (MedDiet) Program9881 – 106
Cardiovascular Parameters - Blood Pressure (BP) Values (Diastolic) Secondary · Week 16

MedDiet is associated with reduction of blood pressure (BP) in non-pregnant adult overweight or obese women. Physiological changes of blood pressure (BP) during pregnancy are characterized by reduction of BP in the second trimester with return to the pre-pregnancy level late in the third trimester and postpartum period. Heart rate (HR) increases by 20% to 25% over baseline during gestation. Maternal BP and HR will be obtained by a calibrated automated oscillometric device during prenatal visits from the first to the third trimesters following the standardized technique established in our clini

GroupValue95% CI
American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program69.87± 8.34
Mediterranean Diet (MedDiet) Program70.80± 9.90
Cardiovascular Parameters - Blood Pressure (BP) Values (Diastolic) Secondary · Week 24

MedDiet is associated with reduction of blood pressure (BP) in non-pregnant adult overweight or obese women. Physiological changes of blood pressure (BP) during pregnancy are characterized by reduction of BP in the second trimester with return to the pre-pregnancy level late in the third trimester and postpartum period. Heart rate (HR) increases by 20% to 25% over baseline during gestation. Maternal BP and HR will be obtained by a calibrated automated oscillometric device during prenatal visits from the first to the third trimesters following the standardized technique established in our clini

GroupValue95% CI
American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program67.20± 6.49
Mediterranean Diet (MedDiet) Program67.80± 11.91
Cardiovascular Parameters - Blood Pressure (BP) Values (Diastolic) Secondary · Week 30

MedDiet is associated with reduction of blood pressure (BP) in non-pregnant adult overweight or obese women. Physiological changes of blood pressure (BP) during pregnancy are characterized by reduction of BP in the second trimester with return to the pre-pregnancy level late in the third trimester and postpartum period. Heart rate (HR) increases by 20% to 25% over baseline during gestation. Maternal BP and HR will be obtained by a calibrated automated oscillometric device during prenatal visits from the first to the third trimesters following the standardized technique established in our clini

GroupValue95% CI
American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program67.20± 6.09
Mediterranean Diet (MedDiet) Program66.60± 8.53
Cardiovascular Parameters - Blood Pressure (BP) Values (Diastolic) Secondary · Week 38

MedDiet is associated with reduction of blood pressure (BP) in non-pregnant adult overweight or obese women. Physiological changes of blood pressure (BP) during pregnancy are characterized by reduction of BP in the second trimester with return to the pre-pregnancy level late in the third trimester and postpartum period. Heart rate (HR) increases by 20% to 25% over baseline during gestation. Maternal BP and HR will be obtained by a calibrated automated oscillometric device during prenatal visits from the first to the third trimesters following the standardized technique established in our clini

GroupValue95% CI
American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program73.93± 5.43
Mediterranean Diet (MedDiet) Program67.80± 10.06
Cardiovascular Parameters - Blood Pressure (BP) Values (Systolic) Secondary · Week 16

MedDiet is associated with reduction of blood pressure (BP) in non-pregnant adult overweight or obese women. Physiological changes of blood pressure (BP) during pregnancy are characterized by reduction of BP in the second trimester with return to the pre-pregnancy level late in the third trimester and postpartum period. Heart rate (HR) increases by 20% to 25% over baseline during gestation. Maternal BP and HR will be obtained by a calibrated automated oscillometric device during prenatal visits from the first to the third trimesters following the standardized technique established in our clini

GroupValue95% CI
American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program116.33± 9.34
Mediterranean Diet (MedDiet) Program116.27± 9.91
Cardiovascular Parameters - Blood Pressure (BP) Values (Systolic) Secondary · Week 24

MedDiet is associated with reduction of blood pressure (BP) in non-pregnant adult overweight or obese women. Physiological changes of blood pressure (BP) during pregnancy are characterized by reduction of BP in the second trimester with return to the pre-pregnancy level late in the third trimester and postpartum period. Heart rate (HR) increases by 20% to 25% over baseline during gestation. Maternal BP and HR will be obtained by a calibrated automated oscillometric device during prenatal visits from the first to the third trimesters following the standardized technique established in our clini

GroupValue95% CI
American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program113.13± 10.14
Mediterranean Diet (MedDiet) Program109.73± 12.40

Adverse events — posted to ClinicalTrials.gov

Time frame: 1 year. Reporting threshold: 0%. Adverse-event reports describe events observed during the trial — not all are caused by the drug.

American College of Obstetricians and Gynecologists (ACOG)-Based Dietary Program
Serious: 0/21 (0%)
Deaths: 0/21
Mediterranean Diet (MedDiet) Program
Serious: 0/20 (0%)
Deaths: 0/20
Other adverse events (3 terms — click to expand)

ReactionSystemAmerican College of Obstet…Mediterranean Diet (MedDie…
Gestational diabetes mellitusPregnancy, puerperium and perinatal conditions
Gestational hypertensionPregnancy, puerperium and perinatal conditions
EclampsiaPregnancy, puerperium and perinatal conditions

Data from ClinicalTrials.gov NCT05868954 adverse events section.

Sponsor's own description

The purpose of this Pilot randomized clinical Trial is to compare two healthy diet styles during pregnancy. Patients between 8 and 16 weeks of gestation who agree to participate will be randomly assigned (like flipping a coin) to either receive routine healthy diet advice and counseling, or to receive advice and counseling for the Mediterranean style diet. Our current routine healthy diet program follows the recommendations provided by the American College of Obstetricians and Gynecologists (ACOG). It recommends the consumption of grains, fruits, vegetables, protein foods, and dairy foods during pregnancy. The Mediterranean diet (MedDiet) is a well-known healthy diet that consists of a large amount of plant-based foods such as fruits, vegetables, beans, and nuts with olive oil as the principal source of fat. Dairy, fish, and poultry are consumed in moderation and red meat only eaten occasionally. Throughout their pregnancy, participants will receive free food and be assessed to determine adherence to the diet and receive counseling to reinforce diet recommendations.

Publications & conference data

1 peer-reviewed publication reference this trial (live from Europe PMC):

  1. Dietary Patterns and Diet Quality before and/or during Pregnancy and How These Affect Birth Outcomes: A Systematic Review and Meta-analysis.
    Salatas C, Bronnert A, Lawrence R, Alexander T, et al · · 2025 · cited 1× · PMID 40812509 · DOI 10.1016/j.advnut.2025.100490

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Other recruiting trials for Gestational Weight Gain

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