What are the effects of caffeine during pregnancy and infertility? How much should you consume?

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When you are pregnant or trying to get pregnant, you may want to take a break from work or relax at home with a cup of coffee or tea. However, since coffee and tea contain caffeine, some people may be worried that consuming them while trying to get pregnant may make it harder to have a baby.

In this article, we will explain the effects of caffeine on pregnancy and how much coffee you can consume in a day.

What are the effects of caffeine during pregnancy and infertility?

What is the recommended intake? According to the World Health Organization (WHO), it is safe to drink three to four cups of coffee per day during pregnancy. From this point of view, up to 3 to 4 cups of coffee a day is acceptable during pregnancy.

However, it is still unclear whether the amount of caffeine you consume will make it harder for you to get pregnant, and what effect caffeine has on your baby. Similarly, after pregnancy, it is safe to assume that caffeine will not have any effect on the baby as long as it is not consumed in large amounts.

In fact, the WHO has stated that the effects of caffeine on the fetus have not been determined, so please try to avoid caffeine as much as possible when you become pregnant.

What other beverages contain caffeine besides coffee?

Other than coffee, what other drinks contain caffeine? We picked up 7 typical drinks that women like and checked how much caffeine they contain per 100ml.

  • <Caffeine content per 100ml >
    DrinkCaffeine concentrationNote
    Coffee60mg/100mlExtraction method: 10g coffee powder/150ml boiling water
    Instant coffee (granulated products)57mg/100mlExtraction method: 2g instant coffee/140ml boiling water
    high‐quality green tea160mg/100mlExtraction method: 10g tea leaves / 60ml hot water at 60℃, 2.5 minutes
    Black tea30mg/100mlExtraction method: 5g tea/360ml boiling water, 1.5-4 minutes
    Green tea20mg/100mlExtraction method: 10 g tea/90°C, 430 ml, 1 min
    Oolong tea20mg/100mlExtraction method: 15g of tea/650ml of 90°C hot water, 0.5 min.
    Energy drink32~300mg/100mlCaffeine concentration and content vary by product.


    WHO states that “cocoa and coke beverages contain as much caffeine as black tea”, so if you are a frequent drinker of cocoa and cola beverages, please refer to the caffeine content of black tea.

Precautions when consuming caffeine during Pregnancy & Infertility

Do not drink in the evening or later.

Caffeine excites the sympathetic nervous system and wakes up the brain. Drinking caffeine in the evening or later can make it difficult to fall asleep and cause sleep deprivation. Try not to drink in the evening or later.

Caffeine makes your body cold.

Caffeine itself has an effect that makes your body cold. When your body is cold, your internal organs work slower, and if you habitually consume a lot of caffeine, it may make it difficult to get pregnant.

It is best to limit your intake of caffeine to three or four cups of coffee a day, and replace it with herbal tea or barley tea.

It is also found in food, so pay attention to the ingredient list!

In Japan, caffeine is recognized as a food additive, so in addition to the drinks mentioned above, it may also be found in medicines and gum that claim to help you wake up. Therefore, it is possible to consume caffeine without realizing it.

When taking over-the-counter medicines, please read the accompanying instructions carefully. Make sure it does not say anything about not taking it with caffeine such as coffee or tea.

Also, be careful not to take gum or drinks that claim to help you sleep at the same time as coffee.

What can pregnant women drink instead of coffee?

Some of you reading this article may be thinking that you want to avoid caffeine during pregnancy. If this is the case, here are a few drinks that we recommend.

Decaffeinated coffee

Decaffeinated coffee is a drink that contains less or no caffeine while retaining the aroma of coffee. You can still get the satisfaction of enjoying coffee.

Dandelion coffee

This coffee is made from dandelion root, and although it is called coffee, it does not contain coffee beans. it has a taste similar to coffee, and many pregnant women also enjoy drinking it.

Herbal tea

If you are drinking coffee or caffeinated beverages for refreshment, you may want to drink herbal tea instead. They come in a variety of flavors, so you may want to try different flavors to find your favorite.

Rooibos tea and barley tea are also caffeine-free drinks and are one of the best alternatives to caffeinated beverages.

To reduce the number of caffeinated drinks, you can drink decaffeinated coffee, herbal tea, or barley tea instead. When drinking them, a hot drink is recommended so as not to cool down the body.


With the right knowledge, it is good to be able to have a relaxed mind and not be overly anxious about your infertility. You need to be careful what you drink or eat but enjoy the maternity life.

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