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Why it matters
Coffee, tea, soda and energy drinks are part of most people’s day, and you don’t have to give them up to try for a baby. What matters is the amount. Keeping caffeine moderate is recommended before and during pregnancy, and it’s one of the easiest changes on this list. It also helps your sleep, which supports everything else. For a partner, moderate caffeine is fine; the bigger wins are sleep and cutting back on sugary energy drinks.
What the research actually says
The guideline: under 200 mg a day. The American College of Obstetricians and Gynecologists advises keeping caffeine under 200 mg a day during pregnancy. That’s about two small 8-oz cups of brewed coffee. Since you may be pregnant for a couple of weeks before you know it, it makes sense to start this limit while you’re trying.
Getting pregnant. Studies on caffeine and the time it takes to conceive are mixed. Moderate intake does not seem to have a clear effect. High intake, well above 200 mg a day, has been linked in some studies to taking longer to conceive, but the findings aren’t consistent.
Pregnancy loss. Higher caffeine intake in early pregnancy has been linked with a higher risk of miscarriage in several studies. That’s the main reason for the 200 mg limit.
Sperm. Research on caffeine and sperm quality is inconsistent. Moderate coffee or tea hasn’t been clearly shown to harm sperm. Some studies link high intake, especially from energy drinks and sugary colas, with poorer outcomes, but those drinks often come alongside other habits such as short sleep or poor diet.
Sleep. Caffeine stays active in your body for many hours. An afternoon coffee can make it harder to fall asleep and cut into deep sleep, even if you don’t notice it.
Where you stand
Add up a typical day using these approximate amounts:
| Drink | Approximate caffeine |
|---|---|
| Brewed coffee, 8 oz | ~95 mg |
| Espresso, 1 shot | ~65 mg |
| Instant coffee, 8 oz | ~60 mg |
| Decaf coffee, 8 oz | ~2–5 mg |
| Black tea, 8 oz | ~47 mg |
| Green tea, 8 oz | ~28 mg |
| Cola, 12 oz can | ~34 mg |
| Energy drink, 8 oz | ~80 mg |
| Dark chocolate, 1 oz | ~12 mg |
Amounts vary a lot by brand and brewing. Some things to watch:
- Cup size. A “medium” coffee-shop brewed coffee is often 16 oz, which is roughly 190 mg or more, almost your whole day in one cup. Large and cold-brew drinks can go well over 200 mg.
- Energy drinks usually come in 12–16 oz cans, with about 120–300 mg or more per can. Check the label.
- Hidden sources: pre-workout powders, some headache pills, and “focus” supplements can contain caffeine.
- Timing: caffeine after about 2 p.m. can affect your sleep.
Signals it’s worth cutting back: your daily total is over 200 mg, you rely on caffeine to function, you feel jittery or anxious, or you get headaches when you miss your usual dose.
Your plan
This week
For you
- Track 3 typical days, including every coffee, tea, soda and energy drink, with sizes. Use the table above.
- If you’re under 200 mg: great. Keep it there, and move your last caffeinated drink to before 2 p.m.
- If you’re over 200 mg: don’t quit cold turkey. Cut about 50–100 mg every 3–4 days to avoid headaches and fatigue.
- Order smaller: switch from a 16-oz to an 8- or 12-oz coffee. This is often the single easiest step.
For your partner
- Aim for a moderate intake, with no need to be strict. A couple of cups of coffee or tea a day is fine.
- If they drink energy drinks, swap them for coffee, tea or water, and keep caffeine to earlier in the day.
This month
- Try “half-caf”: mix regular and decaf coffee, or ask for half-caf at a coffee shop. You keep the ritual with about half the caffeine.
- Swap your second cup: make it decaf coffee, herbal tea (such as ginger or peppermint), or green tea.
- Replace soda with sparkling water and a splash of juice or fruit.
- Handle withdrawal: drink water, get outdoor light and movement in the morning, and expect any headaches to ease within a week or so.
- Check your labels for caffeine in pre-workouts, pain relievers and supplements.
Next 90 days
- Settle into a steady routine that keeps you under 200 mg every day, for example one 8-oz brewed coffee in the morning and one black tea before lunch (about 140 mg).
- Plan ahead for pregnancy: the same limit continues once you’re pregnant, so a habit you’re comfortable with now carries straight through.
- Pay attention to sleep and energy (Sleep Pattern). Many people find they need less caffeine once their sleep improves.
- For your partner: keep caffeine moderate and energy drinks rare, and protect sleep.
A note on herbal teas
Most common herbal teas, such as peppermint, ginger, rooibos and chamomile, are caffeine-free and fine in normal amounts. Avoid “fertility,” “detox” or “cleansing” tea blends with long ingredient lists. Their herbs aren’t well studied for safety in early pregnancy.
When to talk to your doctor
- You drink a lot of caffeine and find it hard to cut down, or get strong withdrawal symptoms.
- You feel your heart racing, have palpitations, or feel anxious after caffeine.
- You rely on caffeine to get through the day because of ongoing exhaustion. That may point to a sleep problem, low iron or thyroid issues worth checking.
- You take medications or supplements that might contain or interact with caffeine.
- You’ve been trying for 12 months (under 35), 6 months (35–39), or you’re 40 or over. Go sooner if your periods are very irregular or absent, you have a known condition, or you’ve had 2 or more losses.
Bottom line
You can keep your coffee. Just keep your total under 200 mg a day, about two small 8-oz cups of brewed coffee, and have it earlier in the day. Watch cup sizes and energy drinks, cut down gradually if you need to, and let your partner stay moderate.
References
Caffeine and Getting Pregnant https://www.tommys.org/pregnancy-information/planning-a-pregnancy/are-you-ready-to-conceive/caffeine-and-getting-pregnant
Relationship between caffeine intake and infertility: a systematic review of controlled clinical studies https://bmcwomenshealth.biomedcentral.com/articles/10.1186/s12905-020-00973-z
Caffeine: Does it affect your fertility? https://www.babycenter.com/getting-pregnant/how-to-get-pregnant/caffeine-does-it-affect-your-fertility_4489
Does Caffeine Affect Fertility? https://www.verywellfamily.com/caffeine-and-fertility-1960253
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