PREGNANCY
DOES COFFEE CAUSE INFERTILITY? SEPARATING FACT FROM FICTION
Apr 24, 2024
Quick Answer
Coffee does not cause infertility for most people who drink it in moderation. ACOG and the American Society for Reproductive Medicine both put the safe caffeine ceiling at less than 200 milligrams a day, about one 12 ounce cup of coffee. Fertility risk climbs at higher, regular intake, not from your morning cup. The specifics below cover exactly where that line sits for you and your partner.
Key Takeaways
- Under 200 mg of caffeine a day, about one 12 oz cup of coffee, is not linked to fertility problems, per ACOG and ASRM
- Every additional 100 mg of caffeine a day raises pregnancy loss risk by 14 to 26 percent in the largest dose response analysis to date
- Cola specifically, not coffee, tea, or cocoa, has been tied to lower sperm count and volume in men
- The safe limit barely changes between trying to conceive and being pregnant, but the reasoning behind it does
- Decaf, tea, soda, chocolate, and some medications all carry caffeine too, so your morning cup is rarely your only source
You’ve probably heard some version of the coffee and fertility rumor, maybe from a friend, a forum, or your own worried search at 2am. As a board certified OB/GYN, I hear this question often from patients who are trying to conceive and don’t want to give up their morning routine for no reason. Here is what the actual research says, not just the headlines.
What the Studies Say
Several studies have looked at caffeine and fertility, covering sperm health, time to pregnancy, and pregnancy outcomes. The findings are more specific than the vague warnings you may see online, and the amount you drink matters far more than the fact that you drink coffee at all.
SPERM HEALTH AND MALE FERTILITY
A large review of 28 studies covering nearly 20,000 men found that coffee, tea, and cocoa were not linked to lower sperm count, motility, or shape in most research. The exception is cola. Cola-containing sodas were consistently tied to reduced semen volume and sperm concentration, which is a different picture than the old warning about coffee itself. If your partner drinks a lot of caffeinated soda, that is the habit worth looking at when it comes to male fertility, not necessarily the coffee.
FEMALE FERTILITY: THE REAL DEAL
For women, moderate coffee intake has not been shown to meaningfully lower fertility on its own. Older studies raised concern at high intake, but more recent, larger analyses point to dose as the deciding factor rather than coffee as a category. The clearest guidance ties back to that 200 milligram daily ceiling covered above, not to cutting caffeine out completely. If fertility issues are already part of your picture, caffeine is one variable among several worth discussing with your OB/GYN.
PREGNANCY OUTCOMES AND BEYOND
Once you are pregnant, caffeine research gets a lot more specific about dose rather than presence. The details on exactly how much raises risk, and by how much, are covered in the dose section below. The short version is that your daily total matters far more than whether you have coffee at all, and staying under the 200 milligram ACOG limit keeps you in the range every major guideline considers safe.
BOTTOM LINE: FINDING YOUR BALANCE
So where does that leave you? There is no single number that guarantees a healthy pregnancy or protects fertility completely, but the research is more reassuring than most of what circulates online. Moderate coffee in the 200 milligram range is not the fertility risk it is sometimes made out to be. What matters more is your total caffeine load across the whole day, not just the cup in your hand right now.
Can I Drink Decaf?
Decaf is a reasonable option if you are trying to lower your total caffeine without giving up the ritual of a warm cup. It is not completely caffeine free. An 8 ounce cup of decaf brewed coffee still has about 2 to 5 milligrams of caffeine, compared to roughly 95 to 165 milligrams in a regular cup. That is a small enough amount that it rarely affects your daily total in any meaningful way.
Good News for Coffee Lovers
Here is the good news. Enjoying your daily cup, or even two, is unlikely to make or break your fertility. If you are trying to conceive and want to be cautious, cutting back or switching to decaf is a reasonable choice, but it is not the only lever that matters. Diet, sleep, stress, and movement all influence fertility as much as, or more than, caffeine does. I want you to walk away from this article focused on the full picture, not just the coffee in your cup.
What about Soft Drinks?
Soda is an easy source of caffeine to forget about. A 12 ounce cola typically has around 35 to 47 milligrams of caffeine, less than a cup of coffee but enough to add up if you are drinking more than one a day. If you are tracking your total caffeine for fertility reasons, count every sugary soda the same way you count your coffee.
What About Energy Drinks?
Energy drinks deserve closer attention. Many contain 50 to 160 milligrams of caffeine per serving, on top of stimulants like guarana and taurine that are not as well studied for fertility. Research has linked heavier energy drink intake to menstrual irregularities in women and lower sperm quality in men. If fertility is on your mind, this is the easiest category to cut back on first, since the caffeine content is usually far higher than most people realize.
How Much Caffeine Is Actually Risky?
The honest answer is that risk rises with dose, not with the fact that you drink coffee at all. In the largest dose response analysis on this topic to date, covering 34 studies and nearly 293,000 participants, each 100 milligram increase in daily caffeine was linked to a 14 to 26 percent higher risk of pregnancy loss, and each additional cup of coffee a day raised that risk by about 3 percent. That means one cup a day sits in a very different risk category than four or five cups. The guidance throughout this article, staying under 200 milligrams a day, is built directly on data like this, not on a general sense that caffeine is bad.
Caffeine by the Cup: How Your Favorite Drinks Compare
These figures come from Cleveland Clinic and the American Pregnancy Association, cross-checked against each other since exact caffeine content varies by brand and brew strength.
| Beverage | Typical Caffeine | Servings to Reach 200 mg |
|---|---|---|
| Brewed coffee (8 oz) | 95-165 mg | About 1.5 cups |
| Decaf coffee (8 oz) | 2-5 mg | Not a practical limit |
| Espresso (1 oz shot) | 47-64 mg | About 3-4 shots |
| Latte (8 oz) | 63-126 mg | About 2 cups |
| Black tea (6 oz) | 45 mg | About 4-5 cups |
| Green tea (6 oz) | 40 mg | About 5 cups |
| Cola (12 oz) | 35-47 mg | About 5 cans |
| Energy drink (8 oz) | 50-160 mg | As few as 1-2 cans, check the label |
Does Caffeine Affect Male Fertility Too?
Most of the caffeine and fertility conversation focuses on women, but sperm health is part of the equation too. A systematic review covering 28 studies and nearly 20,000 men found that coffee, tea, and cocoa were not consistently linked to lower sperm count or quality. Cola-containing sodas were the exception, showing a link to reduced semen volume and concentration. What I want you and your partner to take from this is that swapping soda for coffee, not cutting caffeine altogether, may be the more useful change if sperm health is a concern.
Trying to Conceive vs. Already Pregnant: Does the Advice Change?
The safe caffeine ceiling barely moves between trying to conceive and being pregnant, but the reasoning behind it does. ASRM’s guidance on optimizing natural fertility treats moderate caffeine, around 1 to 2 cups of coffee a day, as having no clear negative effect on your ovulation or ability to conceive. Once implantation happens and you are pregnant, ACOG’s guidance shifts the focus to that same 200 milligram ceiling, but for a different reason, protecting the pregnancy itself rather than your odds of conceiving in the first place. In both cases, the number to remember stays the same. What changes is why it matters.
If you take one thing from all of this, sis, let it be that your morning coffee is not quietly working against you. Fertility is shaped by dozens of factors, sleep, stress, weight, underlying hormone conditions, and yes, caffeine, but rarely any single one of them in isolation. Keep your total under 200 milligrams a day, pay closer attention to soda and energy drinks than to your actual cup of coffee, and talk to your OB/GYN if you have questions specific to your own health history.
Frequently Asked Questions
How many cups of coffee can I drink while trying to get pregnant?
Most guidance points to about 1 to 2 cups of regular coffee a day, staying under 200 milligrams of total caffeine. ASRM’s research on natural fertility has not found a clear negative effect on conception at that level, though everyone’s caffeine sensitivity is a little different.
Does caffeine affect a man's sperm count or fertility?
Coffee, tea, and cocoa have not been consistently linked to lower sperm count in the research reviewed for this article. Cola-containing sodas are the exception, showing a connection to reduced semen volume and concentration, so that is the more useful habit to watch.
Does caffeine increase miscarriage risk?
At higher intake, yes. A 2022 dose response analysis found that each 100 milligram increase in daily caffeine raised pregnancy loss risk by 14 to 26 percent. Staying under the 200 milligram ACOG limit keeps you well outside that higher-risk range.
Can I drink coffee during IVF treatment?
ASRM’s fertility guidance treats moderate caffeine the same way during IVF as during any other attempt to conceive, generally fine under 200 milligrams a day. Ask your fertility clinic directly, since some protocols set their own stricter limits during specific phases of treatment.
Is decaf coffee safe when trying to conceive or pregnant?
Yes. Decaf still has a small amount of caffeine, usually 2 to 5 milligrams per 8 ounce cup, but that is low enough to have almost no effect on your daily total.
What foods and drinks contain hidden caffeine besides coffee?
Chocolate, matcha, some sodas, energy drinks, and several over the counter pain and headache medications all contain caffeine. If you are tracking your intake closely, check labels rather than assuming coffee is your only source.
The 7-Day Hormone Challenge
Instantly access actionable steps and data-driven strategies to conquer hormonal imbalance and gain quick wins day by day!
The Ultimate Hormone Assessment
Understand your hormonal imbalance type with our signature 48-question quiz, designed to uncover the root of your symptoms!
The Madame Estrogen Mastermind
Access a comprehensive solution to say goodbye to your hormonal imbalance!
The Hormone Wellness Network
Embody hormone harmony. Unleash your inner wonder woman — masterclasses, accountability, sisterhood, access to Doctor P, and more!
