Maternal hyperuricemia and adverse maternal-fetal outcomes: a systematic review and meta-analysis of observational studies

Quick Take: Elevated maternal uric acid levels correlate consistently with increased risk of adverse maternal and fetal outcomes, necessitating heightened clinical vigilance.

💡 Clinical Impact

• [Mechanistic Why]: Hyperuricemia signifies a pro-inflammatory, oxidative stress state implicated in endothelial dysfunction and placental pathology. This biological cascade directly contributes to the pathophysiology of preeclampsia, fetal growth restriction, and preterm birth.
• [Clinical/Systemic Benefit]: This data establishes hyperuricemia as a predictive biomarker for refined risk stratification in obstetrics. Early identification can prompt targeted surveillance protocols and proactive management for high-risk trajectories.

📊 Evidence Breakdown

Evidence Grade: 🟡 6/10 (Systematic Review of Observational Studies)

Analysis: This meta-analysis consolidates a significant, consistent signal regarding maternal hyperuricemia. However, the reliance on observational data introduces risks of unmeasured confounding and heterogeneity in diagnostic criteria, limiting definitive causal inference.

Note: This synthesis establishes a strong associative signal; direct interventional data demonstrating improved outcomes by targeting hyperuricemia in pregnancy is currently absent.

🩺 Practice Recommendation

[Early Signal]: Integrate this signal cautiously into clinical decision-making.

Monday Morning Action:

1. Consider maternal hyperuricemia ($>5.0–5.5$ mg/dL) as a marker of increased risk during routine antenatal assessment, particularly if other preeclampsia risk factors are present.
2. Do not initiate uric acid-lowering therapy based solely on these levels. Current evidence does not support this as a primary intervention; focus remains on managing the resulting clinical pathology.
3. Implement heightened surveillance (e.g., more frequent BP monitoring, serial fetal growth assessments) in patients with unexplained persistent hyperuricemia.

View Original Research on PubMed