Coffee and wine attract more fertility folklore than almost any other kitchen habit. UK pages are calmer than Instagram. Alcohol and caffeine are not the same advice. This piece is for both partners, because semen quality and a pregnancy that has not declared itself yet sit in the same household.
Caffeine: conceiving versus already pregnant
UK fertility guidance is surprisingly relaxed here: there is no consistent evidence of an association between caffeinated drinks (tea, coffee, energy drinks and colas) and fertility problems. That sentence was kept in 2026. It is not “drink as much as you like once there is a fetus”.
Once you are pregnant, the NHS foods-to-avoid page is the one that matters: do not have more than 200 mg of caffeine a day. Too much caffeine has been linked to a higher chance of miscarriage and stillbirth. Estimated amounts on that page:
- About 100 mg in a cup of instant coffee — filter and shop coffee can be more
- About 75 mg in a cup of tea
- About 40 mg in a can of cola
- About 80 mg in a 250 ml energy drink
- Under 25 mg in a 50 g bar of plain dark chocolate; under 10 mg in milk chocolate
Energy drinks and caffeine tablets count. Some pre-workout powders count. Herbal tea is a different paragraph: no more than four cups a day, and avoid liquorice root. Because you will not know you are pregnant on day 16, many couples quietly run the 200 mg cap while TTC so they are not over the line in week three. That's a household choice. It is not what you have to do to conceive.
Alcohol: two different sentences for her and him
For the person who could become pregnant, drinking no more than 1 or 2 units once or twice a week, and avoiding intoxication, reduces the risk of harming a developing fetus. The Chief Medical Officers' safest approach is to avoid alcohol altogether. The NHS drinking-alcohol-while-pregnant page is the same “safest to avoid” line. You cannot date a positive test to the hour. If you're actively TTC, treating every luteal phase as a possible early pregnancy is the conservative reading of those pages.
For him: excessive alcohol is detrimental to semen quality; drinking within the UK Chief Medical Officers' low-risk guidance — 14 units a week, spread across several days, for example up to 2 units a day — is unlikely to affect semen quality. That's not a recommendation to drink 14. It is a ceiling below which semen harm is not expected. Bingeing the 14 on a Saturday is not “spread across several days”.
| Drink (typical UK pub measure) | Rough units | Notes |
|---|---|---|
| Pint of 4% beer or cider | About 2.3 units | NHS unit calculator: strength × volume (ml) ÷ 1,000 |
| 175 ml glass of 12% wine | 2.1 units | A “large” 250 ml is about 3 units |
| Single 25 ml 40% spirit | 1 unit | A double is 2 |
| Alcopop ~275 ml 4% | About 1.1 units | Easy to under-count |
The 14-unit weekly guidance for adults is low-risk drinking, not a fertility prescription. Pregnancy: safest to avoid. Those two sentences can live in one kitchen without a row if you decide the rule before the Friday booking.
What actually moves the needle more than coffee
The same chapter is much firmer on smoking (reduces fertility; passive smoking too; men: association with reduced semen quality), BMI 30 or over, and BMI under 18.5 with missing periods. If you're cutting coffee to 50 mg and still smoking, you have the priorities upside down. Complementary therapies for fertility have not been properly evaluated — including the ones sold next to the decaf.
Both partners, same 90-day window. A formula does not metabolise espresso. It can sit beside the boring public-health list: folic acid 400 µg if she could conceive, vitamin D as NHS advises, and a preconception stack if you want one tub each. Her Fertility, Him Fertility and the couple bundle are that shelf.
FAQ
Do we have to quit coffee to get pregnant?
No. There is no consistent evidence linking caffeinated drinks and fertility problems. The 200 mg cap is a pregnancy limit. Many TTC couples adopt it early so they are already under it at a positive test.
He has a pint most nights. Is that the semen problem?
A pint of 4% beer is over 2 units. Nightly, that is more than 14 units a week and not “spread as up to 2 units a day”. Excessive intake harms semen quality. Cut that before buying a fourth antioxidant.
Can I keep energy drinks if I drop coffee?
They are caffeine. A 250 ml can is about 80 mg on the NHS list; some cans are larger. They also tend to be sugar. Count them in the 200 mg if you are running the pregnancy cap.
Decaf the folklore. Keep the 200 mg pregnancy cap, and the alcohol units honest for both of you. If you still want a 90-day nutrition window beside that, that is the fertility pair.
How the formulas sit beside the drinks advice
Cut-downs on caffeine and alcohol do more than any capsule. If you are already using a preconception formula in the same months, that is Her Fertility and Him Fertility. Zinc contributes to normal fertility and reproduction. Selenium contributes to normal spermatogenesis. Her Fertility also carries CoQ10 300 mg and NAC 400 mg. They do not cancel a heavy weekend.
Leave a comment
All comments are moderated before being published.
This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.