Red Raspberry Leaf Tea in Pregnancy: Safety, Timing, and Evidence
Traditional Use vs. Evidence
Red raspberry leaf (Rubus idaeus) tea is a popular herbal remedy in pregnancy, traditionally used for uterine toning and labor preparation.
Safety Profile
- Generally recognized as safe (GRAS) in food amounts.
- Timing: Most midwives/herbalists recommend starting at 32–34 weeks; avoid first trimester (theoretical uterine stimulation).
- Dose: 1–3 cups/day (1 tsp dried leaf/cup); up to 2.4 g/day studied.
Proposed Benefits (Limited Evidence)
- Shortens second stage of labor (some small RCTs).
- Reduces forceps/ventouse delivery.
- May decrease preterm/post-term delivery rates.
- Anecdotal: reduces nausea, tones uterus, eases afterpains.
Evidence Gap
Systematic reviews (Cochrane) find insufficient high-quality evidence to recommend for or against routine use. No large RCTs confirm efficacy or long-term neonatal safety.
Contraindications / Cautions
- Prior C-section or uterine surgery (theoretical rupture risk).
- Preterm labor risk, placenta previa, vasa previa.
- Multiple gestation, polyhydramnios.
- Blood-thinning meds (contains vitamin K).
Bottom Line
Discuss with your OB/midwife. If used, start late second/early third trimester, moderate dose, discontinue if contractions become regular/painful before 37 weeks.
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