Fetal alcohol syndrome (FAS) belongs to a group of disorders called fetal alcohol spectrum disorder. It is caused when a woman drinks
during pregnancy. The alcohol can cause birth and developmental defects in the baby. These defects make up FAS.
Alcohol can cross from the mother's blood to the baby's blood. It is passed through the placenta. Even a small amount of alcohol can damage the fetus. It is not known how much alcohol it takes to cause defects. Social, binge, moderate, and heavy drinking all have a negative effect on fetal development.
All types of alcohol, including beer and wine, can cause birth defects.
Blood Traveling Through Mother's Placenta to Baby
Alcohol travels through this path and affects the baby's development, particularly the heart and brain.
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Factors that increase your baby's chance of FAS include: Unplanned pregnancy or failing to recognize pregnancy and continuing to drinkAlcohol use disorderLack of knowledge about the risks of drinking while pregnantLow socioeconomic status
Birth and developmental defects depend on when the fetus was exposed to alcohol and how much alcohol was consumed.
Babies with FAS may have the following physical symptoms: Low birth weightSmall size and delayed growthSmall headSmall eyesShort, flat noseFlat cheeksSmall jawsUnusually shaped earsThin upper lipShaking or tremorsSight and hearing problemsHeart defectsSmall, abnormally formed brainVision problemsEar infections
As the infant grows, other symptoms may develop, including: Difficulty eating and sleepingDelayed speechLearning disabilitiesIntellectual disabilityPoor coordinationBehavior problemsPoor ability to control impulsesProblems getting along with other children
Children do not outgrow these effects. Teens and adults often experience social and emotional problems. They may develop secondary conditions, which include: Problems at schoolInability to hold a jobTrouble living independentlyMental health problems
Difficulty controlling angerLegal problems
The doctor will ask you about your alcohol intake while pregnant. The child's growth will be assessed. A physical exam will be done. The diagnosis is based on: History of alcohol useCharacteristic facial appearanceSlow growthNervous system problems
Some children with this condition do not have the typical physical features. Their condition is described as: Fetal alcohol effectAlcohol related neurodevelopmental disorder
An early diagnosis can help your child get the proper services.
There is no specific medical treatment for this condition. Early intervention is helpful, as well as a supportive, nurturing home. The doctor may recommend hearing and vision testing, as well as testing for any other medical problems related to FAS.
Professional support helps a family cope with caring for a child with birth defects. Services include respite care and parent training. You can learn ways to handle behavioral problems and stress management techniques.
Programs designed to meet your child's needs can help improve learning. For example, messages may need to be repeated. Tasks may need to be broken down into smaller steps.
A supportive environment includes: Providing consistent direction and structure.Keeping to routines.Establishing simple rules, limits, and consequences.Praising desired behaviors.Lack of threats and violence. Violence or abuse increases the risk the child will learn to react in a similar fashion. Your child may need special training to learn ways to handle anger.
Efforts to prevent fetal alcohol syndrome are important.
Avoid drinking alcohol if you are pregnant or trying to get pregnant. Also, take
to prevent other birth defects.
Avoid heavy drinking when not using birth control. Damage can occur before you even know you are pregnant.Seek help from a doctor if you cannot stop drinking.Use birth control until you are able to quit drinking.
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Accessed July 26, 2013.
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National Organization on Fetal Alcohol Syndrome website. Available at:
Last reviewed June 2015 by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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