If giving up your morning coffee feels impossible, we have good news: you probably don't have to completely quit caffeine while trying to conceive. But the research does suggest moderation matters—especially as you move through your fertility journey.
What the Research Says
Studies on caffeine and fertility have produced mixed results, which is why guidelines vary. Here's what we know:
- Under 200mg/day appears safe: Most large studies find no significant impact on time to conception at moderate intake levels
- Higher intake may delay conception: Some research links 300mg+ daily to longer time to pregnancy
- IVF may be more sensitive: Studies suggest even moderate caffeine might affect IVF outcomes
- Male fertility matters too: High caffeine intake may affect sperm DNA integrity
The American College of Obstetricians and Gynecologists (ACOG) recommends limiting caffeine to under 200mg daily during pregnancy. Most fertility specialists extend this recommendation to the TTC phase.
Caffeine Content by Beverage
| Beverage | Serving Size | Caffeine (approx) |
|---|---|---|
| Brewed coffee | 8 oz | 95-165mg |
| Espresso | 1 shot (1 oz) | 63mg |
| Latte/Cappuccino | 12 oz (2 shots) | 126mg |
| Cold brew | 12 oz | 150-200mg |
| Black tea | 8 oz | 40-70mg |
| Green tea | 8 oz | 25-45mg |
| Diet Coke | 12 oz | 46mg |
| Dark chocolate | 1 oz | 12-25mg |
Coffee shop sizes: A "grande" at Starbucks is 16oz, containing ~310mg caffeine—already over the limit. Cold brew: Often has significantly more caffeine than regular coffee. Energy drinks: Can contain 150-300mg per can, plus other stimulants. Best avoided when TTC.
Practical Strategies for Cutting Back
If you're currently drinking more than 200mg daily, here's how to reduce without the withdrawal headaches:
- Taper gradually: Reduce by 25% every few days rather than quitting cold turkey
- Switch to half-caf: Mix regular and decaf to halve your intake
- Size down: Order a small instead of a large
- Swap afternoon coffee for tea: Green or black tea has less caffeine
- Try Swiss Water Process decaf: Uses no chemicals and tastes better than traditional decaf
A simple approach: have one 8-12oz coffee in the morning, then switch to decaf, herbal tea, or water for the rest of the day. This keeps you under 200mg while still allowing your morning ritual.
For Men: Does Caffeine Affect Sperm?
Research on male caffeine consumption is less conclusive, but some studies suggest very high intake (4+ cups daily) may affect sperm DNA integrity. Most fertility specialists recommend men also moderate caffeine to 200-300mg daily when TTC.
During Fertility Treatment
If you're undergoing IVF or other fertility treatments, some studies suggest being more conservative with caffeine. Some clinics recommend reducing to under 100mg daily during stimulation and the two-week wait. Ask your RE for their specific guidance.
The Two-Week Wait
Once you might be pregnant, it makes sense to treat your body as if you are. Stick to under 200mg daily during the luteal phase/two-week wait, as early pregnancy is when the embryo is most vulnerable.