Breastmilk and the Link to Overweight/Obesity and Maternal Diet in the Mother-breastmilk-child Triad
BLOOM-Triad
Analysis of the Transmission of Overweight/Obesity in the Mother-breastmilk-child Triad in Relation to Maternal Cardiometabolic Status and Diet
1 other identifier
observational
165
2 countries
4
Brief Summary
The prospective 5-month follow-up study will involve 150 mother-infant dyads grouped based on maternal baseline BMI category (normal weight, overweight, obesity). The investigators plan 3 study visits (1, 3, and 6 months postpartum) with analysis the following parameters and outcomes:
- 1.maternal anthropometry and body composition;
- 2.maternal dietary intake and dietary patterns (with results of biomarker-based validation);
- 3.maternal status of lipophilic antioxidants, selected vitamins, and fatty acids profile that may be related to adipose tissue metabolism, inflammation, and cardiometabolic status;
- 4.maternal metabolomics, adipokines, insulin, selected biomarkers of inflammation, altered glucose metabolism, and oxidation;
- 5.breastmilk composition assessed by systemic approach (macronutrients, fatty acids profile, lipophilic antioxidants, adipokines, hormones, immunological profile, and preliminary lipidomic analysis in part of the study group);
- 6.infant growth trajectory, body composition, urine metabolomics, and biomarkers of oxidative stress.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P50-P75 for all trials
Started Feb 2026
Typical duration for all trials
4 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
January 19, 2026
CompletedStudy Start
First participant enrolled
February 1, 2026
CompletedFirst Posted
Study publicly available on registry
March 9, 2026
CompletedPrimary Completion
Last participant's last visit for primary outcome
February 1, 2029
ExpectedStudy Completion
Last participant's last visit for all outcomes
September 1, 2029
March 9, 2026
January 1, 2026
3 years
January 19, 2026
March 2, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (28)
Difference between groups and change from 1 to 6 months postpartum in maternal body fat percentage
Assessment of changes in total body fat content, assessed by a bioelectrical impedance analysis (BIA) and a dual-energy X-ray absorptiometer (DXA). Results will be reported as a percentage (%).
1, 3, and 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal fat-free mass percentage
Assessment of changes in fat-free mass, assessed by a bioelectrical impedance analysis (BIA) and a dual-energy X-ray absorptiometer (DXA). Results will be reported as a percentage (%).
1, 3, and 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal Visceral Fat Area
Assessment of changes in visceral fat area, assessed by DXA. Results will be reported as square centimeters (cm\^2).
1, 3, and 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal Subcutaneous Fat Area
Assessment of changes in subcutaneous fat area, assessed by DXA. Results will be reported as square centimeters (cm\^2).
1, 3, and 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal Body Mass Index (BMI)
Weight and height will be combined to report BMI in kg/m\^2.
1, 3, and 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal Waist-Hip Ratio (WHR)
Assessment of fat distribution calculated as the waist measurement divided by the hip measurement (dimensionless ratio).
1, 3, and 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal Waist-to-Height Ratio (WHtR)
Assessment of fat distribution calculated as the waist measurement divided by height (dimensionless ratio).
1, 3, and 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in metabolic syndrome (MetS) incidence
Assessment of MetS incidences diagnosed based on the occurence of three from five metabolic abnormalities diagnosed based on International Diabetes Federation-established cut-off points for women for waist circumference (≥80 cm), fasting blood glucose (≥100 mg/dL), triglicerides (≥150 mg/dL), HDL cholesterol (\<50 mg/dL), blood pressure (systolic SBP ≥ 130 or diastolic ≥ 85 mmHg) as a marker of cardiometabolic health.
1, 3, 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal glycated haemoglobin (HbA1c)
Assessment of changes in HbA1c (reported in %) as a marker of maternal cardiometabolic health.
1, 3, 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in Homeostatic Model Assessment - Insulin Resistance (HOMA-IR)
Assessment of HOMA-IR calculated as the product of fasting insulin \[µIU/mL\] and fasting glucose \[µIU/mL\] divided by 22.5 (dimensionless ratio) as an indicator of maternal cardiometabolic health.
1, 3, 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal serum leptin
Assessment of maternal serum leptin assessed by the ELISA method as an indicator of maternal cardiometabolic health.
1, 3, 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal serum adiponectin
Assessment of maternal serum adiponectin assessed by the ELISA method as an indicator of maternal cardiometabolic health.
1, 3, 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal serum and infant urine Retinol-Binding Protein-4 (RBP4)
Assessment of maternal serum and infant urine RBP-4 assessed by the ELISA method as an indicator of maternal and infant cardiometabolic health.
1, 3, 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in human milk macronutrients
Assessment of human milk macronutrients (fat, carbohydrate, dry material, protein, true protein) concentration assessed by mid-infrared (mid-IR) transmission spectroscopy method. Results will be reported in grams per 100 mL.
1, 3, 6 months of postpartum
Difference between groups and change from 1 to 6 months postpartum in human milk energy value
Assessment of human milk energy value assessed by mid-infrared (mid-IR) transmission spectroscopy method. Results will be reported in kcal per 100 mL.
1, 3, 6 months of postpartum
Difference between groups and change from 1 to 6 months postpartum in human milk secretory immunoglobulin A (S-IgA)
Assessment of human milk S-IgA assessed by Enzyme-Linked Immunosorbent Assay (ELISA) method. Results will be reported in grams per liter \[g/L\].
1, 3, and 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in human milk lactoferrin
Assessment of human milk lactoferrin assessed by ELISA method. Results will be reported in grams per liter \[g/L\].
1, 3, and 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in human milk leptin
Assessment of human milk leptin assessed by ELISA method.
1, 3, 6 months of postpartum
Difference between groups and change from 1 to 6 months postpartum in human milk adiponectin
Assessment of human milk adiponectin assessed by ELISA method.
1, 3, 6 months of postpartum
Difference between groups and change from 1 to 6 months postpartum in human milk insulin
Assessment of human milk insulin assessed by ELISA method.
1, 3, 6 months of postpartum
Difference between groups and change from 1 to 6 months postpartum in human milk High-Sensitivity C-Reactive Protein (hs-CRP)
Assessment of human milk hsCRP assessed by ELISA method.
1, 3, 6 months of postpartum
Difference between groups and change from 1 to 6 months postpartum in human milk interleukin 1 (IL-1)
Assessment of human milk IL-1 assessed by ELISA method.
1, 3, 6 months of postpartum
Difference between groups and change from 1 to 6 months postpartum in human milk interleukin 6 (IL-6)
Assessment of human milk IL-6 assessed by ELISA method.
1, 3, 6 months of postpartum
Difference between groups and change from 1 to 6 months postpartum in human milk Tumor Necrosis Factor-alpha (TNF-alfa)
Assessment of human milk TNF-alfa assessed by ELISA method.
1, 3, 6 months of postpartum
Difference between groups and change from 1 to 6 months postpartum in human milk fatty acid profile
Assessment of human milk fatty acid profile analyzed as methyl ester (FAME) by gas chromatography. Results will be reported as concentration within a total fat \[% wt/wt\].
1, 3, 6 months of postpartum
Difference between groups and the change from 1 to 6 months of life in infant anthropometric development
Assessment of anthropometric development calculated as weight-, length-, BMI-, and head circumference z-scores for age and sex, analyzed based on WHO standards.
1, 3, 6 months of life
Difference between groups and the change from 1 to 6 months of life in infant body fat-free mass percentage
Assessment of changes in total body fat-free mass content, assessed by the whole-body DXA scans with a vacuum cushion to prevent movement. Results will be reported as a percentage (%).
1, 6 months of life
Difference between groups and the change from 1 to 6 months of life in infant body fat percentage
Assessment of changes in total body fat content, assessed by the whole-body DXA scans with a vacuum cushion to prevent movement. Results will be reported as a percentage (%).
1, 6 months of life
Secondary Outcomes (13)
Difference between groups and the change from 1 to 6 months postpartum in the maternal resting metabolic rate (RMR)
1, 3, 6 months postpartum
Difference between groups and the change from 1 to 6 months postpartum in maternal dietary intake
1, 3, 6 months postpartum
Difference between groups and the change from 1 to 6 months postpartum in maternal dietary habits
1, 3, 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal short- and long-term fatty acid status
1, 3, 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal and human milk lipophilic antioxidants and vitamins
1, 3, 6 months postpartum
- +8 more secondary outcomes
Other Outcomes (7)
Difference between groups and change from 1 to 6 months postpartum in Bone Mineral Density (BMD)
1, 3, 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal hydration status
1, 3, 6 months postpartum
Difference between groups and change from 1 to 6 months postpartum in maternal well-being
1, 3, 6 months postpartum
- +4 more other outcomes
Study Arms (3)
Normal weight (NW)
n=55 (maternal BMI at baseline 18.5-24.9 kg/m²)
Overweight (OW)
n=55 (maternal BMI at baseline 25-29.9 kg/m²)
Obesity (OB)
n=55 (maternal BMI at baseline \>29.9 kg/m²)
Eligibility Criteria
A group of 165 mother-infant dyads is planned to be recruited from a community sample. The study group will be recruited via advertisements on the Internet, social media, health facilities, and information distributed to midwives and lactation consultants. To reduce bias related to the lack of random selection and increase the quality of our results, the investigators will match participants by maternal age, infant sex, and sociodemographic status - factors potentially affecting exposures and outcomes measured in our study.
You may qualify if:
- for mother:
- at least 19 years,
- plan of exclusively or predominantly breastfeeding for 6 months,
- consent to a sampling of biological material and participate in all planned procedures (for both mother and infant),
- willingness to finish the follow-up,
- well-understanding of the Polish language (for non-Polish nationalities); for infants:
- month or less,
- clinically healthy,
- none or one formula feeding per day
You may not qualify if:
- for mother:
- type 1 or 2 diabetes diagnosed before pregnancy,
- uncontrolled thyroid disease,
- breastfeeding more than 1 child or being a milk donor,
- tobacco/alcohol use during pregnancy or currently,
- inability to express a sufficient amount of milk; for infants:
- congenital disease,
- birth from a multiple pregnancy,
- preterm birth (\<37 Hbd).
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (4)
Food, Nutrition and Health, Uviversity of British Columbia; Affiliated Investigator, Healthy Starts, BC Children's Hospital Research Institute & Women's Health Research Institute
Vancouver, British Columbia, V6T 1Z4, Canada
Wroclaw Medical University
Wroclaw, Lower Silesian Voivodeship, 50-367, Poland
National Institute of Public Health NIH - National Research Institute
Warsaw, Masovian Voivodeship, 00-791, Poland
Department of Human Nutrition, Institute of Human Nutrition Sciences, Warsaw University of Life Sciences (SGGW-WULS)
Warsaw, Masovian Voivodeship, 02-776, Poland
Related Publications (48)
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PMID: 24933025BACKGROUNDAsadi Z,Bahrami A,Zarban A,Asadian AH,Ferns GA,Karbasi S
BACKGROUND
Biospecimen
Maternal: * serum, * erythrocytes, * human milk, * urine, * stool, * buccal swab. Infant: * urine, * stool, * buccal swab.
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Central Study Contacts
Study Design
- Study Type
- observational
- Observational Model
- CASE CONTROL
- Time Perspective
- PROSPECTIVE
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Principal Investigator
Study Record Dates
First Submitted
January 19, 2026
First Posted
March 9, 2026
Study Start
February 1, 2026
Primary Completion (Estimated)
February 1, 2029
Study Completion (Estimated)
September 1, 2029
Last Updated
March 9, 2026
Record last verified: 2026-01