Identifying, synthesising and appraising existing evidence relating to myalgic encephalomyelitis/chronic fatigue syndrome and pregnancy: a mixed-methods systematic review. — CFSMEATLAS
Identifying, synthesising and appraising existing evidence relating to myalgic encephalomyelitis/chronic fatigue syndrome and pregnancy: a mixed-methods systematic review.
Slack, Emma, Pears, Katrina Anne, Rankin, Judith et al. · BMJ open · 2023 · DOI
Quick Summary
This review looked at all available research about how ME/CFS affects pregnancy and how pregnancy affects ME/CFS. Researchers found very few good quality studies on this topic. The existing studies showed mixed results: some women's ME/CFS got worse during pregnancy, some stayed the same, and some improved. The review highlights that pregnant people with ME/CFS need personalized care and extra support, but we need much more research to give clear medical guidance.
Why It Matters
ME/CFS affects reproductive-aged individuals, yet evidence-based clinical guidance on pregnancy management is virtually nonexistent. This systematic review identifies a critical knowledge gap and demonstrates the urgent need for high-quality research to help healthcare providers support pregnant patients with ME/CFS and inform family planning decisions.
Observed Findings
Four quantitative studies on ME/CFS severity during pregnancy showed divergent outcomes: two reported worsening, one found no change, and one found improvement in symptoms.
Only one quantitative study examined pregnancy outcomes, reporting decreased vaginal births, higher spontaneous abortion rates, and increased developmental/learning delays in offspring of individuals with ME/CFS.
Qualitative evidence consistently highlighted the importance of individualized care and the need for support during family planning, pregnancy, and childcare.
Of 3,675 identified articles, only 16 met rigorous inclusion criteria, with 9 of 11 qualitative studies from grey literature sources.
Inferred Conclusions
ME/CFS symptom severity during pregnancy varies substantially between individuals, suggesting pregnancy effects are not uniform and require personalized assessment.
Current evidence base is critically insufficient to develop robust, evidence-based clinical guidelines for managing ME/CFS in pregnancy.
Healthcare systems must provide individualized, multidisciplinary support for pregnant individuals with ME/CFS, including assistance with family planning and childcare.
Urgent, high-quality prospective studies are needed to determine true prevalence and outcomes of pregnancy in ME/CFS populations.
Remaining Questions
What biological mechanisms explain the heterogeneous effects of pregnancy on ME/CFS symptoms, and can patient characteristics predict individual symptom trajectories?
What This Study Does Not Prove
This review does not establish causal relationships between ME/CFS and adverse pregnancy outcomes, as data are too limited and heterogeneous. The findings cannot be generalized across all ME/CFS populations, and the predominance of grey literature with methodological limitations means conclusions are preliminary. The conflicting symptom trajectory findings indicate pregnancy effects are highly individual and not predictable from current evidence.
What is the true incidence and severity of adverse pregnancy outcomes (miscarriage, delivery complications, neonatal outcomes) associated with maternal ME/CFS?
How do healthcare provider knowledge gaps and lack of clinical guidelines affect management quality and maternal/neonatal health outcomes in ME/CFS pregnancies?
What psychosocial, medical, and practical support interventions would most effectively improve outcomes for pregnant individuals with ME/CFS?