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How much alcohol causes fetal alcohol syndrome?

Written by Brandon Okey. Mina Draskovic, B.Psy., reviewed this content for accuracy.

Fetal alcohol syndrome (FAS) is caused by alcohol exposure at any stage of pregnancy, with no known safe level of drinking. Even small amounts, such as 1–2 drinks per occasion or 3–4 drinks per week, can increase the risk of FAS. 

A 2017 systematic review found that about 1 in 67 women who drink during pregnancy has a child diagnosed with FAS. The safest way to protect your baby is to avoid alcohol completely during pregnancy.

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If you’re struggling with alcohol addiction, Ardu offers the support and treatment you need. Reach out to our alcohol rehab center for a healthier future for both you and your child.

What is fetal alcohol syndrome?

Fetal alcohol syndrome is a serious, lifelong condition that occurs when an unborn baby is exposed to alcohol during pregnancy. It’s the most severe form of fetal alcohol spectrum disorder, a range of conditions caused by prenatal alcohol exposure.

Alcohol quickly crosses the placenta and enters the fetus’s bloodstream. Because a developing fetus can’t break down alcohol effectively, it remains in their system longer and causes harm. This exposure disrupts normal fetal development, especially brain growth and function, during critical periods of pregnancy.

The severity of FAS is different for everyone and is influenced by the amount and timing of alcohol exposure during pregnancy. There’s no cure for FAS, but early diagnosis and intervention can improve outcomes. 

How common is fetal alcohol syndrome?

A 2023 comprehensive review reveals that in the United States, fetal alcohol syndrome affects 6 to 9 out of every 1,000 births. The broader category of fetal alcohol spectrum disorders is even more prevalent, ranging from 24 to 48 cases per 1,000 births. This translates to an estimated 1.1% to 5% of U.S. children potentially having FASD.

FAS and FASD rates vary across different populations. Higher risks are observed among groups with lower socioeconomic status and certain racial and ethnic minorities. The situation is particularly alarming among children in foster care, where FAS rates reach as high as 1.5%.

Despite the information available about the dangers of drinking during pregnancy, moms-to-be are still reaching for alcohol. The review also reveals that about 1 in 13 pregnant women say they’ve had a drink. This shows we’ve got more work to do in getting the message across. 

Ardu Recovery Center offers specialized programs for expectant mothers struggling with alcohol use disorder (AUD), including safe detox, tailored counseling, and ongoing support. If you’re pregnant and finding it hard to quit drinking, we are here to help you create a healthier future for both you and your baby.

What are the symptoms of fetal alcohol syndrome?

Fetal alcohol syndrome manifests through a diverse array of physical, behavioral, and cognitive symptoms. 

Physical symptoms of fetal alcohol syndrome

These outward signs are often the most noticeable indicators of prenatal alcohol exposure:

  • Vision or hearing problems
  • Poor coordination and fine motor skills
  • Distinctive facial features (smooth philtrum, thin upper lip, short upturned nose)
  • Small head circumference (microcephaly)
  • Growth deficiencies (lower than average height and weight)
  • Heart defects
  • Kidney problems or urinary tract issues
  • Bone or joint deformities

Behavioral symptoms of fetal alcohol syndrome

People with FAS may struggle with behavioral challenges that impact their daily lives. These symptoms include:

  • Social skills difficulties
  • Problems with daily living skills
  • Poor impulse control
  • Hyperactivity and difficulty with attention
  • Mood swings and impulsivity
  • Difficulty adapting to change
  • Inappropriate social behavior
  • Anxiety or depression

Cognitive symptoms of fetal alcohol syndrome

The cognitive effects of prenatal alcohol exposure include:

  • Speech and language delays
  • Intellectual disability or low IQ
  • Poor reasoning and judgment skills
  • Poor memory
  • Learning disabilities, especially with math
  • Poor problem-solving abilities
  • Difficulty understanding the consequences of actions
  • Problems with abstract thinking

While these symptoms are associated with FAS, their presence alone doesn’t guarantee a diagnosis. FAS shares many characteristics with other conditions. For example, the attention issues and learning difficulties common in FAS can mirror symptoms of ADHD or specific learning disorders. Similarly, some of the physical traits seen in FAS, such as certain facial features or growth deficiencies, may also occur in genetic syndromes.

Many adolescents and adults with fetal alcohol syndrome often struggle with substance abuse, including alcohol dependency. At Ardu, we address this complex issue through our medically supervised detox, cognitive behavioral therapy tailored for FAS-related challenges, and dual diagnosis treatment to manage both addiction and potential co-occurring mental health issues often associated with FAS.

What behavior is typical for FAS?

We’ve already discussed some general behavioral challenges associated with fetal alcohol syndrome. Still, behavioral issues are often the most prominent and persistent signs of FAS, even when physical features are subtle or absent. These behaviors impact a person’s ability to function in daily life, affecting education, relationships, and employment.

Behaviors commonly seen in people with FAS are:

  • Difficulty following multi-step instructions
  • Tendency to be easily distracted or overstimulated
  • Poor impulse control and difficulty with self-regulation
  • Trouble understanding cause-and-effect relationships
  • Difficulty with time management and concept of time
  • Inappropriate social behaviors, such as invading personal space
  • Tendency to be overly friendly with strangers
  • Difficulty adapting to changes in routine
  • Prone to emotional outbursts or tantrums
  • Challenges with money management and understanding value
  • Difficulty recognizing social cues and body language
  • Tendency to engage in risky behaviors
  • Problems with personal boundaries and oversharing
  • Difficulty maintaining friendships and relationships
  • Challenges with abstract thinking and problem-solving

Not all individuals with FAS will exhibit these behaviors. With proper support and interventions, many can lead fulfilling lives, pursue education, maintain relationships, and achieve career success.

Is there treatment for fetal alcohol syndrome?

Fetal alcohol syndrome is a lifelong condition. There is no cure, but early and ongoing treatment can manage the symptoms and improve the quality of life for those affected. A range of therapies and interventions are available to support children and adults with FAS in overcoming developmental, behavioral, and social challenges.

  • Early intervention programs: For children, these programs provide specialized care in the early years. They include speech, physical, and developmental therapies to help reach critical milestones.
  • Speech and language therapy: This therapy helps both children and adults improve communication by enhancing language skills and expression.
  • Occupational therapy: Focuses on improving motor skills, coordination, and daily living activities to promote independence.
  • Behavioral therapy: Provides strategies for managing emotional regulation, attention issues, and social skills for people with FAS of all ages, so they can cope with behavioral challenges.
  • Special education services: For children, tailored educational programs address their specific learning needs. For adults, vocational training or specialized education may be necessary.
  • Medical treatment: Some individuals may need ongoing medical care for physical conditions associated with FAS, such as heart defects, vision problems, or hearing impairments.
  • Parental and caregiver support: Counseling and support groups help families navigate the challenges of caring for a child or adult with FAS. They offer guidance, coping strategies, and community resources.
  • Nutritional therapy: Both children and adults receive proper nutrition to support physical growth and brain development affected by FAS.

With the right treatment plan and ongoing support, people with FAS can develop essential life skills and lead fulfilling lives. If alcohol addiction is part of the challenge, Ardu offers specialized rehab services to help you take control of your life. 

Turn to Ardu Recovery Center for comprehensive care

Our comprehensive addiction treatment is tailored to individuals and families affected by fetal alcohol syndrome and anyone else struggling with addiction. Our programs include:

  • Evidence-based therapies such as cognitive behavioral therapy (CBT) and dialectical behavior therapy (DBT) help you understand and change thought patterns that lead to substance use and teach you healthier coping strategies.
  • Dual diagnosis treatment addresses both addiction and co-occurring mental health issues. These mental disorders often go hand-in-hand—especially in individuals with FAS—and require a comprehensive simultaneous approach.
  • Our supportive group therapy allows you to connect with peers, share experiences, and learn from others on similar recovery journeys.
  • In behavior modification therapy, we focus on reinforcing positive behaviors and reducing negative ones associated with alcohol use.
  • Motivational interviewing helps individuals resolve ambivalence about change and increase their motivation for recovery. This technique is particularly effective in helping people explore and strengthen their own reasons for making positive changes in their lives.
  • Wellbriety is a culturally sensitive approach that integrates traditional Native American teachings with modern recovery methods and promotes holistic wellness.
  • Our relapse prevention and aftercare services equip you with tools and ongoing support to maintain long-term sobriety.

We offer both inpatient and outpatient rehab services.

  • Our residential program provides 24/7 care in a structured environment. This intensive approach is ideal for those needing constant support, especially during early recovery. It includes daily therapy sessions, medical supervision, and a range of holistic activities.
  • For those with work or family commitments, our outpatient services offer flexible treatment options. This includes regular therapy sessions, support groups, and access to our resources while allowing you to maintain your daily responsibilities.

We also provide education on the risks of alcohol use during pregnancy and support for those affected by FAS. Our goal is to help individuals break free from addiction, prevent future cases of FAS, and support those living with its effects.

To learn more about our specialized drug and alcohol addiction programs or those seeking to prevent alcohol-related birth defects, contact Ardu online or via phone (801-872-8480). Our admissions team will work with you to determine the most appropriate treatment path, whether you’re struggling with alcohol dependency while pregnant, planning to conceive, or dealing with the effects of FAS in your life.

We’re committed to providing compassionate, effective treatment that takes into account the unique needs of those impacted by prenatal alcohol exposure. 

But don’t just take our word for it—our track record speaks for itself. 

“…My daughter is in Ardu and she tells me how much she loves it there. As a mother of a person with both mental health and addiction issues, I was of course scared. I wanted her to be in a place that had good people, clean, intensive care… I am at peace knowing that she is in good hands and is learning techniques to become and stay clean.”

Tina Bloxham

5/5
Brandon Okey

Brandon Okey is the co-founder of Ardu Recovery Center and is dedicated to empowering people on their journey to sobriety.

Fetal alcohol syndrome FAQ

Is it bad if you drink the first month of pregnancy?

Drinking alcohol in the first month of pregnancy can cause serious damage. The first month of pregnancy is the most crucial time for fetal development, with many important processes happening before you might even know you’re pregnant. Maternal alcohol consumption during these earliest stages can interfere with fetal brain development and increase the risk of developmental disabilities. Even moderate drinking can lead to lifelong effects. 

Healthcare providers and the Centers for Disease Control and Prevention (CDC) strongly advise against any alcohol during pregnancy. There’s no known safe amount or time to drink when you’re expecting. If you’re trying to conceive or think you might be pregnant, avoid alcoholic beverages entirely.

What if I drank alcohol before I knew I was pregnant?

If you drank before realizing you were pregnant, stop immediately and talk to your healthcare provider. Early alcohol exposure can increase risks, but many women in this situation go on to have healthy babies. The impact depends on how much you drank, when, and your genetics. 

Be honest about your alcohol consumption. Your doctor can assess your situation and recommend appropriate care. They might suggest extra screenings to check fetal development. The good news is that stopping alcohol use at any point during pregnancy can lower the risk of adverse outcomes for your baby. 

When do you know if your baby has fetal alcohol syndrome?

Diagnosing fetal alcohol syndrome isn’t always straightforward and may not be obvious right at birth. Some signs might be noticeable early on. These include:

  • Specific facial features (smooth ridge between upper lip and nose, thin upper lip, small eyes)
  • Low birth weight
  • Small head size 

Many symptoms, especially those related to behavior and development, become clearer as the child grows. 

Diagnosis often happens during early childhood, typically between ages 3 and 10, when learning and behavioral issues become more apparent. Healthcare providers use different methods to assess physical features, growth, and development. In some cases, FAS might not be diagnosed until the teenage years or even adulthood.

Can a few drinks cause FAS?

Fetal alcohol syndrome is associated with heavy drinking during pregnancy, but there’s no known safe amount of alcohol for pregnant women. Even a few drinks, especially during critical periods of fetal development, could potentially cause harm. As little as one drink per week might affect fetal brain development. The risk increases with the amount and frequency of alcohol consumed. Binge drinking (4 or more drinks at once) is particularly dangerous because of high blood alcohol levels. FAS is the most severe form of alcohol-related birth defects, but fewer adverse effects can occur with lower levels of exposure.

How likely is fetal alcohol syndrome?

The likelihood of fetal alcohol syndrome varies based on:

  • How much alcohol a mother drinks
  • How often a mother drinks alcohol in pregnancy
  • Genetics
  • Environmental factors

A 2023 study estimates that FAS affects about 6 to 9 out of every 1,000 births in the United States. The broader category of FASD is more common, affecting 24 to 48 per 1,000 births. About 1 in 67 women who drink any alcohol during pregnancy can have a child with FAS, increasing to 1 in 23 for heavy drinkers. 

How early can alcohol affect a fetus?

Alcohol can affect a fetus from the very earliest stages of pregnancy, even before a woman knows she’s pregnant. The first few weeks after conception are a critical period for fetal development, with rapid cell division and the formation of major organs. Exposure to alcohol during this time can interfere with these processes and cause developmental abnormalities. 

The fetal brain is particularly vulnerable to alcohol throughout pregnancy, but especially in the first trimester. Even low levels of alcohol consumption in these early weeks can impact fetal development and cause alcohol-related neurodevelopmental disorders as the child grows older. Healthcare providers recommend avoiding alcohol completely when trying to conceive or when there’s a chance of pregnancy.

Is drinking at 3 months pregnant bad?

Drinking at 3 months pregnant is risky. By this point, you’re well into the first trimester, a period in which major organs, including the brain, heart, and central nervous system, are forming and growing rapidly. Alcohol consumption during this time can interfere with these processes and lead to long-term developmental issues. Even though the risk of physical birth defects may be lower than in the earliest weeks, alcohol can still have significant impacts on fetal brain development. 

How do you rule out fetal alcohol syndrome?

Ruling out FAS involves a comprehensive evaluation by healthcare professionals. This typically includes:

  • Physical examination: Checking for characteristic facial features and growth deficiencies.
  • Neurobehavioral assessment: Evaluating cognitive function, behavior, and social skills.
  • Maternal history: Gathering information about alcohol consumption during pregnancy.
  • Differential diagnosis: Considering other conditions with similar symptoms.

Healthcare providers might use diagnostic tools such as the 4-Digit Diagnostic Code or other standardized criteria. FAS can be challenging to diagnose, especially if there’s no confirmed history of prenatal exposure to alcohol. Sometimes, other tests might be needed to rule out other conditions. 

If FAS is suspected but can’t be confirmed, a child might be diagnosed with another fetal alcohol spectrum disorder (FASD).

What does a fetal alcohol syndrome face look like?

Children with fetal alcohol syndrome often have distinctive facial features, which are the main diagnostic criteria. These include:

  • A smooth ridge between the upper lip and nose (smooth philtrum)
  • A thin upper lip
  • A short, upturned nose
  • A flattened midface
  • Small eye openings (short palpebral fissures)

Other facial characteristics might include a low nasal bridge, epicanthic folds (skin folds covering the inner corner of the eye), and a small chin. 

These features can be subtle and may become less noticeable as a child grows older. Not all children with FAS will have all these features. These facial characteristics are most reliably identified by trained healthcare professionals. 

Facial features are just one aspect of FAS diagnosis, which also considers growth deficiencies, central nervous system problems, and confirmed prenatal alcohol exposure.

Resources

Popova, S., Lange, S., Probst, C., Gmel, G., & Rehm, J. (2017). Estimation of national, regional, and global prevalence of alcohol use during pregnancy and fetal alcohol syndrome: A systematic review and meta-analysis. The Lancet Global Health, 5(3), e290-e299. https://doi.org/10.1016/S2214-109X(17)30021-9

Hur, Y. M., Choi, J., Park, S., Oh, S. S., & Kim, Y. J. (2022). Prenatal maternal alcohol exposure: Diagnosis and prevention of fetal alcohol syndrome. Obstetrics & Gynecology Science, 65(5), 385-394. https://doi.org/10.5468/ogs.22123

Popova, S., Charness, M. E., Burd, L., Crawford, A., Hoyme, H. E., Mukherjee, R. A., Riley, E. P., & Elliott, E. J. (2023). Fetal alcohol spectrum disorders. Nature Reviews Disease Primers, 9(1), 1-21. https://doi.org/10.1038/s41572-023-00420-x

Sambo, D., & Goldman, D. (2022). Genetic Influences on Fetal Alcohol Spectrum Disorder. Genes, 14(1). https://doi.org/10.3390/genes14010195

Further reading

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What is alcohol poisoning?

Can heavy drinking make you fat?

Why does alcohol deplete nutrients?

Effects of alcohol on mental health

Is alcoholism a genetic condition?

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Can alcoholism cause hypersexuality?