Pregnancy and intake guidance
How caffeine affects pregnancy, current intake guidelines, and practical advice for expecting mothers who consume coffee.

- Coffee Basics Nerds
- 1 min read
Article 5 of 12 in Coffee & Health/

Why Pregnancy Matters for Caffeine
- Caffeine crosses the placenta freely.
- The fetus and placenta lack the enzymes to metabolize caffeine effectively.
- As pregnancy progresses, maternal caffeine metabolism slows:
- Half-life extends from ~5 hours to 8–12 hours in 2nd trimester.
- Up to 15–20 hours in 3rd trimester.
Risks of Excessive Intake
- Miscarriage and Low Birth Weight: Some studies link high caffeine intake (>300 mg/day) with increased risk.
- Preterm Birth: Evidence mixed but possible risk at higher intakes.
- Fetal Development: Potential subtle effects on growth and sleep cycles.
Current Guidelines
- WHO & European Food Safety Authority (EFSA): Limit to ≤200 mg/day caffeine during pregnancy (~2 small cups of brewed coffee).
- American College of Obstetricians and Gynecologists (ACOG): Considers ≤200 mg/day safe.
- Practical Reference:
- Espresso (30 ml): ~60–80 mg.
- Filter coffee (240 ml): ~90–120 mg.
- Cold brew (varies widely): can exceed 200 mg per serving.
Practical Guidance
- Opt for smaller servings or half-caf blends.
- Consider decaf (usually ~2–5 mg/cup).
- Be mindful of other sources: tea, chocolate, sodas, energy drinks.
- Spread intake across the day to reduce peak caffeine levels.
Summary
Pregnant individuals should limit caffeine intake to ≤200 mg/day to reduce risk of miscarriage, low birth weight, and developmental concerns. Choosing smaller cups, decaf, or monitoring hidden sources of caffeine supports safe coffee enjoyment during pregnancy.