Does caffeine affect fertility?
Last updated September 3, 2026.
At normal doses, no meaningful harm shown - the study record is mixed, and no major medical body tells people trying to conceive to quit coffee. Prudence favors a cap, not a ban: around 200 mg daily (roughly one strong 12-ounce coffee) matches pregnancy guidance, so no transition is needed if you conceive. Where caution firms up: high intake above two or three coffees a day, and energy drinks with stacked stimulants. The partner's moderate intake looks equally unalarming - smoking and heat are the proven sperm hits. Spend the worry on the factors with real evidence: timing, weight, smoking, alcohol.
What to do
- Cap around 200 mg daily. One strong coffee; pregnancy-ready by default.
- Drop the energy drinks. Stacked stimulants, no place in the trying months.
- Count the hidden caffeine. Tea, cola, chocolate, and pre-workout all add up.
- Prioritize the proven levers. Smoking and alcohol move fertility; coffee barely registers.
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