
Drinking alcohol while pregnant can be harmful to the baby, but what happens if you drank before you knew you were pregnant? It's a common concern, especially since nearly half of all pregnancies are unplanned in the US, and 20-30% of pregnant people report drinking during pregnancy. While drinking alcohol during pregnancy is not recommended, the risks to your baby decrease if you stop drinking as soon as you find out you're pregnant. The most severe damage is thought to occur during the first three months of pregnancy, so abstinence is advised when trying to conceive. If you have concerns, it's important to talk openly with your healthcare provider to understand your risks and the steps you can take to promote your baby's health.
| Characteristics | Values |
|---|---|
| Risks to the baby | Increased risk of miscarriage, preterm birth, stillbirth, low birth weight, and sudden infant death syndrome (SIDS) |
| Impact on development | Fetal Alcohol Spectrum Disorders (FASDs), including physical and intellectual disabilities, abnormal facial features, growth and central nervous system problems |
| Occurrence | Common, with 20-30% of pregnant people drinking during pregnancy and more than 8% binge drinking |
| Recommendations | Stop drinking as soon as you find out you're pregnant, take prenatal vitamins, maintain a healthy diet, and seek support if needed |
| Severity | The more you drink, the greater the risk; however, small amounts early in pregnancy may be less risky than previously believed |
| Genetic factors | Some people may have a genetic predisposition that decreases or increases the vulnerability of their fetus to alcohol damage |
| Environmental factors | Smoking, nutrition, and other factors can also affect the odds of FASDs |
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What You'll Learn

Miscarriage, preterm birth, stillbirth, and SIDS risks
Drinking alcohol before knowing you are pregnant and continuing to drink during pregnancy increases the risk of miscarriage, preterm birth, stillbirth, and SIDS. Alcohol consumption during pregnancy is associated with an increased risk of miscarriage, and this risk may be heightened when binge drinking is involved.
Fetal alcohol spectrum disorders (FASDs) are caused by exposure to alcohol in utero, and they include a range of physical and intellectual disabilities that may not be visible at birth. While not every child whose parent drinks during pregnancy will have fetal alcohol syndrome, the risk is always present. The more you drink, the greater the risk to the baby.
Drinking alcohol during pregnancy increases the risk of preterm birth and low birth weight. Alcohol can pass from the pregnant woman to the fetus and affect its development. Alcohol use in the first three months of pregnancy can cause the baby to have abnormal facial features, and growth and central nervous system problems can occur from alcohol use at any time during pregnancy.
The risk of stillbirth is also increased with prenatal alcohol exposure. While further research is needed, studies suggest that drinking during pregnancy is linked to an increased risk of stillbirth. In addition, prenatal alcohol exposure can lead to sleep-related issues in infants, such as increased sleep fragmentation and decreased sleep-related spontaneous movements, which are also risk factors for SIDS.
If you have consumed alcohol before knowing you were pregnant, it is important to stop drinking as soon as you find out and consult your healthcare provider. While the risks to your baby decrease if you stop drinking, it is recommended to avoid alcohol completely during pregnancy as there is no known safe amount or time for alcohol consumption during this period.
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Fetal alcohol spectrum disorders (FASDs)
Drinking alcohol before knowing you are pregnant is not uncommon, especially considering that about half of all pregnancies are unplanned. However, it is important to understand the risks associated with alcohol consumption during pregnancy and the potential impact on the developing fetus.
- Abnormal facial features, such as wide-set and narrow eyes, and a smooth ridge between the nose and upper lip.
- Growth deficiencies and low birth weight.
- Central nervous system problems, including cognitive and behavioral deficits, motor and coordination issues, and nervous system abnormalities.
- Behavioral problems, such as deficits in social skills and difficulties in daily living.
- Educational challenges.
The risks associated with FASDs increase with the amount of alcohol consumed, and binge drinking or heavy drinking during pregnancy put the developing fetus at the greatest risk for severe problems. However, it is important to note that even smaller amounts of alcohol can cause harm. The timing of alcohol consumption during pregnancy also matters, with the first three months being a critical period for the baby's development.
If you have consumed alcohol before knowing you were pregnant, it is essential to stop drinking as soon as you find out. While there is no known cure for FASDs, early intervention therapies may help improve a child's development. It is also recommended to speak openly with your healthcare provider to understand your specific risks and to monitor your baby for any signs of FASDs.
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Long-term behavioural, intellectual, and physical disabilities
Drinking alcohol before knowing you are pregnant is not uncommon, especially considering that about half of all pregnancies are unplanned. While there are risks associated with drinking during pregnancy, these risks to your baby decrease if you stop drinking as soon as you find out you are pregnant. The CDC notes that if a pregnant person stops drinking, the baby will likely be better off.
However, drinking alcohol during pregnancy can cause a range of lifelong behavioural, intellectual, and physical disabilities known as fetal alcohol spectrum disorders (FASDs). FASDs refer to a range of physical, cognitive, and behavioural abnormalities caused by prenatal alcohol exposure. These abnormalities can occur at any time during pregnancy, even before a woman knows she is pregnant.
FASDs can lead to deficits after birth and beyond, with individuals experiencing challenges in their daily lives, including performing basic life skills such as feeding, bathing, counting money, and telling time. They may also face secondary disabilities, including medical, educational, mental health, and social challenges.
The most severe type of FASD is fetal alcohol syndrome (FAS), which is characterised by facial features such as small eyes, a thin upper lip, and a smooth philtrum (the groove between the nose and upper lip). Children with FAS may also experience growth deficiencies, heart, bone, and kidney problems, vision issues, hearing loss, seizures, and other neurological problems such as learning disabilities and poor balance and coordination.
If you drank alcohol before knowing you were pregnant, it is important to talk to your healthcare provider as soon as possible to understand the risks and what can be done to support the healthy development of your baby.
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How much and how often alcohol was consumed
It is not uncommon for women to have consumed alcohol before realizing they were pregnant. In fact, according to Robert Sokol, MD, professor of obstetrics and gynecology at Wayne State University School of Medicine in Detroit, about 20% to 30% of pregnant people reported drinking during pregnancy, and more than 8% reported binge drinking (consuming four or more drinks within about two hours).
While there are risks associated with alcohol consumption during pregnancy, these risks decrease if you stop drinking as soon as you find out you are pregnant. The CDC notes that if the pregnant person stops drinking, the baby will likely be better off. The most severe damage is believed to occur during drinking in the first three months of pregnancy, so abstinence is recommended when trying to conceive.
The amount and frequency of alcohol consumption can affect the odds of fetal alcohol syndrome. While there is no known safe amount or time for alcohol use during pregnancy, small amounts of alcohol early in pregnancy may be less risky to the mother and baby than previously thought. A study published in the journal Obstetrics and Gynecology found that minimal alcohol use during the first trimester did not appear to increase the risk for high blood pressure complications, premature birth, or low birth weight.
In terms of how much and how often alcohol was consumed before knowing about the pregnancy, it can vary from person to person. Some women may have consumed a few drinks during a night out or a concert before finding out they were pregnant, while others may have consumed alcohol more regularly, such as a bottle of wine a night or several times a day. It is important to note that heavy alcohol use during pregnancy has been linked to fetal alcohol syndrome, a long-term and irreversible condition.
If you are concerned about alcohol consumption before knowing you were pregnant, it is recommended to talk to a healthcare provider, midwife, or doctor to assess your individual risks and receive guidance on promoting the baby's health.
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What to do if you drank before knowing you were pregnant
It is understandable to worry about the effects of alcohol consumption before knowing you were pregnant. However, it is important to remember that many people have been in similar situations and had healthy babies. The risk to your baby decreases if you stop drinking as soon as you find out you are pregnant. Here are some steps you can take to ensure the best possible outcome:
Stop consuming alcohol immediately
As soon as you find out you are pregnant, it is crucial to stop drinking alcohol. This will help minimise any potential risks to your baby's development.
Take prenatal vitamins
Start taking prenatal vitamins to promote your baby's health and support their development.
Schedule an appointment with your doctor or midwife
Don't hesitate to talk openly with your healthcare provider. They can assess your individual situation, provide guidance, and advise on any necessary steps or interventions.
Ultrasound and developmental monitoring
Your healthcare provider may recommend an ultrasound to check for any anatomical defects. They may also suggest early developmental testing to detect any signs of fetal alcohol spectrum disorder (FASD). FASD can cause a range of physical and intellectual disabilities that may not be visible at birth but can affect your child's life in the long term.
Maintain a healthy lifestyle
In addition to taking prenatal vitamins, focus on maintaining a healthy diet and overall lifestyle. Avoid undercooked meats, raw or high-mercury fish, and follow your healthcare provider's recommendations for a nutritious pregnancy journey.
Remember, it is normal to feel worried, but try not to dwell on the past. The best thing you can do is take proactive steps to ensure a healthy pregnancy moving forward.
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Frequently asked questions
The first step is to stop drinking alcohol for the remainder of your pregnancy. If you are finding it difficult to stop drinking, talk to your midwife, doctor, or pharmacist, or contact your local Alcoholics Anonymous.
There is no known safe amount of alcohol during pregnancy, and drinking can lead to long-term harm to the baby. The more you drink, the greater the risk. Alcohol passes from your blood through the placenta to your baby and can seriously affect its development. However, the risks to your baby decrease if you stop drinking as soon as you find out you're pregnant.
Drinking alcohol during pregnancy increases the risk of miscarriage, premature birth, low birth weight, and fetal alcohol spectrum disorder (FASD). FASD includes a range of physical and intellectual disabilities that may not be visible when your child is born. Alcohol use during pregnancy has also been linked to stillbirth and sudden infant death syndrome (SIDS).
It's not uncommon for women to drink alcohol in early pregnancy without knowing they're expecting. Half the women in the US drink alcohol and half of all pregnancies are unplanned, so there are many cases of women realizing they drank before discovering they were pregnant.
The sooner you stop drinking alcohol, the healthier your baby will be. Regular prenatal checkups can also help monitor your baby's development and identify any potential issues. Early intervention therapies may help improve your child's development if they are diagnosed with FASD.











































