
It is common knowledge that alcohol consumption during pregnancy can be detrimental to fetal development. However, the lore of many cultures encourages lactating women to drink alcohol, believing it optimizes breast milk production and infant nutrition. While some women may follow this advice, others may be concerned about the potential presence of alcohol in their breast milk and its possible impact on their baby. This concern is valid, as alcohol can pass into breast milk and may cause adverse effects on the infant's sleep, development, and early learning. The American Academy of Pediatrics (AAP) advises against alcohol consumption while breastfeeding, and healthcare providers can offer guidance on this topic. The level of alcohol in breast milk corresponds with the mother's blood alcohol level, and various factors influence how long alcohol can be detected in the milk. Recommendations for breastfeeding mothers who consume alcohol include waiting 2 hours per drink before nursing or using previously expressed milk.
| Characteristics | Values |
|---|---|
| How long after drinking alcohol is alcohol level highest in breast milk? | 30 to 60 minutes after consuming an alcoholic beverage. |
| How long can alcohol be detected in breast milk? | 2 to 3 hours per drink after consumption. |
| How long to wait after drinking alcohol before breastfeeding? | 2 hours per drink |
| What can a mother do if she needs to breastfeed before the waiting period is over? | Feed the infant with previously expressed milk. |
| What can a mother do to ease physical discomfort or adhere to her milk expression schedule? | Pump and discard the milk (also known as "pumping and dumping"). However, this does not reduce the amount of alcohol in the mother's milk. |
| What are the effects of alcohol on the infant? | Drowsiness, deep sleep, weakness, abnormal weight gain, decreased milk ejection reflex, slow weight gain, delayed motor development, disrupted sleep patterns, lower milk intake. |
| What are the effects of alcohol on the mother? | Decreased milk production, decreased milk ejection reflex. |
| Is it necessary to pump and dump after drinking alcohol? | No, alcohol passes freely in and out of breast milk. Pumping and dumping does not reduce the amount of alcohol in the mother's milk. |
| How long does it take for alcohol to clear a mother's system? | It takes a 140-pound woman about 2 to 3 hours to eliminate the alcohol in one serving of beer or wine. The more alcohol consumed, the longer it takes to eliminate it. |
| How much alcohol passes into breast milk? | Less than 2% of the alcohol dose consumed by the mother reaches her milk and blood. |
| What is the recommended alcohol intake for breastfeeding mothers? | Limit to one or two glasses of wine (8 ounces total) or one or two beers. |
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What You'll Learn

How much alcohol passes into breast milk?
The amount of alcohol in breast milk is directly related to the amount of alcohol in the mother's bloodstream. Alcohol levels in breast milk are usually highest about 30 to 60 minutes after drinking. After this, as the mother's blood alcohol level falls, so does the alcohol level in her breast milk. Generally, alcohol can be detected in breast milk for about 2 to 3 hours per drink consumed. This means that the more alcohol a mother consumes, the longer alcohol can be detected in her breast milk. For example, alcohol from two drinks can be detected for about 4 to 5 hours, and alcohol from three drinks can be detected for about 6 to 8 hours.
The amount of alcohol in breast milk also depends on other factors, such as the mother's weight, how quickly she consumes the alcohol, whether she consumes it with food, and how fast her body breaks down alcohol. It is important to note that alcohol may inhibit breast milk letdown and slow the flow of milk to the baby due to its impact on the hormones linked to milk production.
Research suggests that the amount of alcohol that a baby will ingest through breast milk is only a small fraction of what the mother consumes. One study found that if a baby drinks 100 ml of breast milk while the mother has a blood alcohol level of 0.05 per cent, the baby will consume 50 mg of alcohol. This is equivalent to the baby drinking 1.5 ml of beer, 0.5 ml of wine, or 0.2 ml of hard liquor. Another study suggests that the amount of alcohol a baby will ingest is approximately 5-6% of the weight-adjusted maternal dose.
While there is no known safe level of alcohol consumption while breastfeeding, moderate alcohol consumption (up to one standard drink per day) is generally considered acceptable. However, it is important to wait at least two hours after consuming alcohol before breastfeeding or expressing milk. Additionally, drinking more than the recommended amount of alcohol can interfere with the milk ejection reflex and lead to decreased milk production over time.
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How long to wait before breastfeeding after drinking alcohol?
It is recommended that breastfeeding mothers abstain from drinking alcohol completely. However, moderate alcohol consumption, defined as up to one standard drink per day, is usually considered safe and is not known to be harmful to the infant.
If a breastfeeding mother consumes alcohol, it is advised that she waits for at least two hours per drink before breastfeeding her baby. For example, if the mother consumes two drinks, it is recommended to wait for at least four hours before breastfeeding. This waiting period allows the alcohol levels in the breast milk to decrease. During this waiting period, the mother can choose to express or pump milk to ease physical discomfort or maintain her milk expression schedule. However, if she chooses to express or pump milk within the two hours per drink recommendation, the expressed milk should be discarded, a practice often referred to as "pumping and dumping." It is important to note that pumping and dumping does not accelerate the reduction of alcohol levels in the mother's milk.
The alcohol content in breast milk corresponds to the alcohol level in the mother's bloodstream. Typically, it takes approximately two to three hours for a 140-pound woman to eliminate the alcohol from one serving of beer or wine from her body. The time required to eliminate alcohol increases with the amount of alcohol consumed. For instance, if the same woman consumed four drinks, it would take nine to ten hours for her breast milk to be alcohol-free.
It is crucial to understand that alcohol consumption above moderate levels can have adverse effects on an infant's development, growth, and sleep patterns. Excessive drinking by the mother can lead to slow weight gain or inadequate development in the baby. Additionally, it can impair the mother's judgment and ability to care for her child safely. Therefore, it is recommended to refrain from bed-sharing with the baby after drinking alcohol, as both the mother's and baby's natural reflexes will be affected.
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What are the risks to the baby?
The risks to the baby depend on the amount of alcohol consumed by the breastfeeding mother and the time elapsed before breastfeeding. Alcohol is not stored in breast milk but is present at the same level as in the mother's blood, rising and falling with it. Peak alcohol levels in breast milk occur approximately 30 to 60 minutes after drinking and decrease thereafter. The more alcohol consumed, the longer it takes for it to be eliminated from the body and breast milk. For example, it takes around two to three hours for a 63.5 kg woman to eliminate the alcohol from one serving of beer or wine.
Babies may experience side effects if their mother's blood alcohol level reaches 300 mg/100ml, with studies showing that babies nurse more frequently when their mother has consumed alcohol. However, they don't metabolise alcohol as well as adults, and when there is alcohol in the milk, they seem to take less milk than they otherwise would in the 3-4 hours after an alcoholic beverage is consumed. This can lead to decreased milk intake, which, combined with the slowed milk release caused by alcohol, can compromise milk supply and the baby's growth if the mother drinks substantial amounts regularly.
Excessive drinking by the mother can result in abnormal weight gain in the infant, slow weight gain, or failure to thrive. Alcohol abuse can also affect the milk ejection reflex, leading to decreased milk intake and potentially delayed motor development in the baby. Mothers who have been drinking should not bed-share with their babies as their natural reflexes will be affected.
Moderate alcohol consumption, or one drink per day, is considered safe by the Centers for Disease Control and Prevention, and occasional and responsible use of alcohol is typically not harmful to babies. To minimise risk, breastfeeding mothers can breastfeed their baby immediately before drinking any alcoholic beverage or express and store milk to use later. It is recommended to wait at least two hours after drinking one standard drink before breastfeeding the baby.
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Does alcohol affect milk supply?
Alcohol consumption can affect milk supply in several ways. Firstly, alcohol inhibits the release of oxytocin, the hormone responsible for the milk ejection reflex, which can result in a decreased milk intake by the infant. This decrease in milk intake is not related to the infant spending less time suckling or rejecting the flavour of the milk. Instead, it is due to the slowed milk release caused by alcohol, which can negatively impact both milk supply and the baby's growth.
Secondly, alcohol consumption can affect the mother's judgment and ability to care for her child safely. This includes the ability to breastfeed effectively, as alcohol can cause physical discomfort and interfere with the milk expression schedule. Additionally, mothers who have been drinking should avoid bed-sharing with their babies as their natural reflexes will be impaired.
Thirdly, alcohol consumption can lead to abnormal weight gain in the infant and may result in slow weight gain or failure to thrive. This is because infants consume less milk in the hours following maternal alcohol consumption, and their sleep patterns may also be disrupted.
Finally, alcohol consumption can affect the baby's development and behaviour. Excessive drinking by the mother can lead to delayed motor development and may impact the baby's early learning about alcohol. Therefore, while occasional exposure to alcohol through breast milk is considered insignificant, excessive drinking or intoxication can have detrimental effects on both the mother and the infant.
To minimise exposure to alcohol, lactating mothers can pump or feed just before drinking, limit their intake to one standard drink, and wait for at least 2 to 3 hours before directly breastfeeding their infants again.
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Do I need to pump and dump after drinking alcohol?
Pumping and dumping breast milk after drinking alcohol is not always necessary. The amount of alcohol in breast milk parallels the amount in the bloodstream, so if you feel sober enough to drive, it is likely safe to breastfeed. The general recommendation is to wait at least two hours per drink before nursing again to ensure alcohol has left the system. Pumping and dumping may be considered if the mother feels uncomfortable or to ease engorgement, but it will not speed up the elimination of alcohol from the body.
The effects of alcohol on a breastfeeding baby depend on the amount ingested by the mother. Moderate alcohol consumption, or one drink per day, is generally considered safe by the Centers for Disease Control and Prevention (CDC). However, drinking more than this amount can interfere with the milk ejection reflex and may lead to decreased milk supply. Additionally, babies may experience drowsiness, weakness, and poor weight gain over time if exposed to high levels of alcohol through breast milk.
If a mother chooses to consume alcohol, she can express and store breast milk beforehand to use for feeding while the alcohol clears from her system. Alternatively, she can wait until her blood alcohol level is low before nursing. It is important to note that alcohol is not trapped in breast milk and will naturally leave the milk as it leaves the bloodstream. The rate at which alcohol leaves the body and breast milk depends on various factors, including the type and amount of drink, as well as individual characteristics such as weight and metabolism.
While occasional drinking is not harmful to the baby, it is important to prioritize the health and safety of the infant. Drinking alcohol can impair a caregiver's judgment and ability to care for the baby safely. If there are concerns about alcohol consumption, it is recommended to consult a healthcare professional or lactation consultant for personalized advice.
In summary, pumping and dumping after drinking alcohol is not always necessary. The decision depends on individual comfort levels, blood alcohol levels, and the time elapsed since consuming alcohol. The general guideline is to wait at least two hours per drink before breastfeeding again, and alternative feeding options can be considered if needed.
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Frequently asked questions
It is recommended to wait 2 hours per drink consumed before breastfeeding. Alcohol levels are usually highest in breast milk 30 to 60 minutes after drinking, and can be detected for about 2 to 3 hours per drink. The more alcohol consumed, the longer it takes to leave the body.
As infants are less able to process alcohol than adults, some researchers believe that the dosage they receive through breast milk may be stronger than in an adult. Drinking to the point of intoxication may impact the way infants sleep and may cause drowsiness, deep sleep, weakness, and abnormal weight gain in the infant.
Pumping and dumping will not remove alcohol from your breast milk. As alcohol leaves your bloodstream, it leaves your breast milk. If you want to ease physical discomfort or stick to your milk expression schedule, you can pump and discard the milk.
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