Systematic reviewindependent cross-checkabstract checked I-EGG-104 standard review
Avoiding eggs and milk in pregnancy does not prevent allergies in the baby
Maternal dietary antigen avoidance during pregnancy or lactation, or both, for preventing or treating atopic disease in the child.
Overview
Kramer MS, Kakuma R. Cochrane Database Syst Rev 2012 · PMID 22972039 · DOI 10.1002/14651858.CD000133.pub3
Trials found no protection against eczema and a slightly lower weight gain in pregnancy.
Does the study support the specific claim? No · Methodological quality: high
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Assess maternal allergen-avoidance diets.
- How was the study done?
Cochrane review of trials.
- How many people, animals or samples were studied?
About 1,500 women in 8 trials.
- What was actually found?
No allergy prevention benefit; possible small nutritional harms in pregnancy.
- How large was the observed effect?
Not pooled in abstract as a single number.
- What do the results mean in everyday life?
Pregnant women do not need to avoid eggs to protect the baby from allergies.
- What are the study's limitations?
Small, older trials.
- What does it say about Elawady's specific claim?
Contradicts egg exclusion in pregnancy.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
It does not address cardiovascular effects of eggs.
Scientific in-depth review
1. Full reference
- Authors
- Kramer MS, Kakuma R
- Journal
- Cochrane Database Syst Rev
- Year
- 2012
- Identifier
- PMID 22972039 DOI 10.1002/14651858.CD000133.pub3
- Verification
- verified – PubMed efetch 2026-10-26; Crossref works API 2026-10-26
- Retracted
- no
- Corrections
none; Crossref shows this version updates CD000133.pub2 (new version, not a correction)
- Extent checked
- abstract only
- Conflicts of interest and funding
Canadian Institutes of Health Research; authors declared none known.
2. Research question
Does an antigen-avoidance diet (e.g., cow milk, egg) in pregnancy or lactation prevent or treat atopic disease in the child, and how does it affect maternal and infant nutrition?
3. Study design and population
- Study design
- Systematic review – Cochrane systematic review of randomized or quasi-randomized trials
- Population
Pregnant or lactating women, mostly at high risk of atopic offspring
- Country
Multinational
- Period
Search to 6 July 2012
- Sample size
5 pregnancy trials (952 participants); 2 lactation trials (523); 1 crossover trial (17)
- Inclusion and exclusion criteria
not detailed in abstract
4. Methods and endpoints
- Exposure / intervention
Maternal avoidance of dietary antigens such as cow milk and egg
- Comparator
Unrestricted diet
- Endpoints
Atopic eczema, other atopic disease, gestational weight gain, preterm birth, birthweight
- Statistical methods
Meta-analysis of RCTs
5. Actual results
- Results
Pregnancy avoidance: no protective effect on atopic eczema in the first 18 months (5 trials, 952 participants); slightly but significantly lower mean gestational weight gain, non-significantly higher risk of preterm birth and non-significant reduction in mean birthweight. Lactation avoidance (2 trials, 523): no significant protective effect on eczema or skin-prick tests to cow milk, egg or peanut.
- Absolute risks
not reported
- Authors' conclusion
An antigen avoidance diet in pregnancy is unlikely to substantially reduce a high-risk child's atopic disease risk and may adversely affect maternal or fetal nutrition.
6. Strengths
- Cochrane methods
- Includes nutritional harms
7. Weaknesses
- Few and small trials; old evidence
- Not specific to egg alone
8. Risk of bias
- Orienting tool
- AMSTAR 2
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- low
- Rationale
Cochrane review; primary trials small.
9. Assessment of the statistical interpretation
Benefit absent; possible nutritional harms (lower gestational weight gain) are small but in the unfavourable direction.
10. Relevance to the specific claim
Shows that removing foods such as egg in pregnancy brings no allergy benefit for the child and may adversely affect maternal or fetal nutrition.
11. Independent contrary findings
Lactation avoidance may reduce eczema severity in already affected infants (small crossover trial).
12. Transferability to Germany and Europe
Applicable universally.
13. Overall methodological judgement
Relevant to the pregnancy safety aspect: egg/allergen avoidance in pregnancy is not recommended.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | high |
| Risk of bias | some concerns |
| Precision of results | low |
| Directness | indirect |
| Reproducibility | partly replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | high |
| Adequacy of the interpretation (by the archive) | not applicable |
14. Open questions
No trial of egg avoidance alone in pregnancy outside allergy prevention.
15. Linked fact checks
- Eggs should be completely avoided (all kinds, all cooking methods). – Studies contradicting or limiting the claim