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Guidelines for Identifying and Referring Persons with Fetal Alcohol Syndrome An erratum has been published for this article. To view the erratum, please click here.
The material in this report originated in the National Center on Birth Defects and Developmental Disabilities, José F. Cordero, MD, Director, and the Division of Birth Defects and Developmental Disabilities, Coleen Boyle, PhD, Director.
Corresponding preparer: Jacquelyn Bertrand, PhD, National Center on Birth Defects and Developmental Disabilities, 1600 Clifton Road NE, MS E-86, Atlanta, GA 30333. Telephone: 404-498-3928; Fax: 404-498-3050; E-mail: firstname.lastname@example.org.
Fetal alcohol syndrome (FAS) results from maternal alcohol use during pregnancy and carries lifelong consequences. Early recognition of FAS can result in better outcomes for persons who receive a diagnosis. Although FAS was first identified in 1973, persons with this condition often do not receive a diagnosis. In 2002, Congress directed CDC to update and refine diagnostic and referral criteria for FAS, incorporating recent scientific and clinical evidence. In 2002, CDC convened a scientific working group (SWG) of persons with expertise in FAS research, diagnosis, and treatment to draft criteria for diagnosing FAS. This report summarizes the diagnostic guidelines drafted by the SWG, provides recommendations for when and how to refer a person suspected of having problems related to prenatal alcohol exposure, and assesses existing practices for creating supportive environments that might prevent long-term adverse consequences associated with FAS. The guidelines were created on the basis of a review of scientific evidence, clinical expertise, and the experiences of families affected by FAS regarding the physical and neuropsychologic features of FAS and the medical, educational, and social services needed by persons with FAS and their families. The guidelines are intended to facilitate early identification of persons affected by prenatal exposure to alcohol so they and their families can receive services that enable them to achieve healthy lives and reach their full potential. This report also includes recommendations to enhance identification of and intervention for women at risk for alcohol-exposed pregnancies. Additional data are needed to develop diagnostic criteria for other related disorders (e.g., alcohol-related neurodevelopmental disorder).
Prenatal exposure to alcohol during pregnancy damages the developing fetus and is a leading preventable cause of birth defects and developmental disabilities (1--3). Children exposed to alcohol during fetal development can suffer multiple negative effects, including physical and cognitive deficits. Although the number and severity of negative effects can range from subtle to serious, they are always lifelong.
Referral and diagnosis for fetal alcohol syndrome (FAS) can be made throughout the lifespan. However, the majority of persons with FAS are referred and receive a diagnosis during childhood. Thus, the terms "child" or "children" as used in these guidelines are not intended to preclude referral, assessment, and diagnosis of older persons.
The effects of prenatal exposure to alcohol and basic diagnostic features of FAS were first described in 1973 (4--8). In 1981, the U.S. Surgeon General issued a public health advisory warning that alcohol use during pregnancy could cause birth defects (9); this warning was reissued in 2004 (10). In 1989, Congress mandated that language warning of the consequences of drinking during pregnancy be included on alcohol product labels (11).
Despite the known adverse effects of prenatal exposure to alcohol (4,5), children who experience these effects often do not receive a correct diagnosis or referral for diagnostic evaluation because of the absence of uniformly accepted diagnostic criteria and guidelines for referral. Early identification and diagnosis of FAS in affected persons are essential components to providing health, education, and social services that promote optimal well-being. In 2002, Congress directed CDC to 1) develop guidelines for diagnosing FAS and other negative birth outcomes resulting from prenatal exposure to alcohol, 2) incorporate these guidelines into curricula for medical and allied health students and practitioners, and 3) disseminate curricula concerning these guidelines to facilitate training of medical and allied health students and practitioners.
These guidelines represent a consensus of opinion from persons with expertise in relevant scientific and clinical fields, with input from service professionals and families affected by FAS. Information that served as the basis for the development of these guidelines was obtained from published scientific literature, clinical knowledge of participants, and the experience of families affected by FAS.
CDC staff initially identified reports and other documents that were used as the scientific basis for creating diagnostic guidelines. On the basis of this information, and in coordination with the National Taskforce on Fetal Alcohol Syndrome and Fetal Alcohol Effect (NTFFAS/FAE), other federally funded FAS programs, and nongovernment organizations concerned with FAS, CDC formed a scientific working group (SWG) of persons with expertise in research and clinical practice regarding prenatal exposure to alcohol to develop diagnostic guidelines for FAS.
Guidelines were formulated on the basis of consensus among SWG members and NTFFAS/FAE. To assist in defining the dysmorphologic features most useful for identifying persons with FAS, SWG members assembled a matrix of the major and associated dysmorphic features of non-FAS syndromes that had one or more features in common with FAS. This matrix was used to determine a combination of dysmorphic features most discriminative for FAS. To assist deliberations concerning central nervous system (CNS) abnormalities associated with FAS, persons with expertise in the science, assessment, and treatment of psychological aspects of FAS were asked to identify the CNS abnormalities and other neurobehavioral domains most common among persons affected by prenatal alcohol exposure. These responses formed the basis for discussion and the resulting guidelines for CNS abnormalities for persons with FAS.
This report summarizes the guidelines drafted as a result of the SWG's deliberations, provides recommendations for when and how to refer a person suspected of having problems related to prenatal alcohol exposure, and assesses existing practices for creating supportive environments that might prevent long-term adverse consequences associated with FAS.
Varied FAS prevalences (range: 0.2--1.5 cases per 1,000 live births) have been reported worldwide (12--15). Other studies that used different ascertainment methodologies have produced different estimates (range: 0.5--2.0 cases per 1,000 live births) (16--22). These rates are comparable with or higher than rates for other common developmental disabilities (e.g., Down syndrome or spina bifida) (23). On the basis of these prevalence estimates, approximately 4 million infants are born each year with prenatal alcohol exposure, and an estimated 1,000--6,000 are born with FAS.
Studies have reported consistently that >50% of all U.S. women of childbearing age report alcohol consumption during the previous month (1,24--28). The majority of these women drank only occasionally, but >13% could have been classified as moderate or heavy drinkers. In addition, 12% of women reported binge drinking (i.e., consuming five or more drinks on one occasion) during the preceding month (1,25,27,28). Approximately half of all U.S. pregnancies are unintended, and millions of women of childbearing age are sexually active while not using adequate contraception (24--28). Recent data from the Behavioral Risk Factors Surveillance System indicate that an estimated 12%--13% of U.S. women aged 18--44 years are sexually active, do not use contraception effectively, and drink alcohol frequently or binge drink, thereby putting them at risk for an alcohol-exposed pregnancy (24). Because data are available for all subpopulations, prevalences might be greater than these data indicate.
Fetal Alcohol Spectrum Disorder
Multiple terms are used to describe the continuum of effects that result from prenatal exposure to alcohol, including fetal alcohol effects, alcohol-related birth defects (ARBD), alcohol-related neurodevelopment disorder (ARND), and, most recently, fetal alcohol spectrum disorders (FASDs) (29). In April 2004, the National Organization on Fetal Alcohol Syndrome (NOFAS) convened a meeting of representatives from three federal agencies (the National Institutes of Health [NIH], CDC, and the Substance Abuse and Mental Health Services Administration [SAMHSA]) and persons with expertise in the field to develop a consensus definition of FASDs. The resulting definition, which is used in this report, defined FASDs as the range of effects that can occur in a person whose mother drank alcohol during pregnancy, including physical, mental, behavior, and learning disabilities, with possible lifelong implications. As this definition indicates, multiple diagnostic categories (e.g., FAS, ARND, and ARBD) are subsumed under the term FASDs. However, FASDs is not a diagnostic category and should be used only when referring to the collection of diagnostic terms resulting from prenatal exposure to alcohol.
For the majority of health-care providers, the key indicator of FAS is the set of characteristic facial features first described in 1973 (4). Alcohol is a teratogen that results in dysmorphia, growth problems, and abnormalities of the central nervous system in multiple ways (30,31).
Confirmation and documentation of prenatal alcohol exposure can be difficult to establish. For birth mothers, admission of alcohol use during pregnancy can be stigmatizing. The situation can be further complicated if the woman continues to use alcohol, especially at high consumption rates. Clinicians might need to obtain information regarding alcohol use from other reliable informants, such as a relative.
Clinicians often have to evaluate a child or adult for FAS without definitive information regarding the mother's use of alcohol during pregnancy. This situation occurs frequently for children in foster and adoptive homes. In such cases, every effort should be made to obtain the necessary information, but lack of confirmation of alcohol use during pregnancy should not preclude a diagnosis of FAS if all other criteria are present. In rare instances, absence of exposure will be confirmed. Documentation that the birth mother did not drink any amount of alcohol from conception through birth would indicate that a FAS diagnosis is not appropriate. This finding typically implies either that the birth mother knew the date of conception (e.g., a planned pregnancy) and did not consume alcohol from that day forward or that she was prevented from drinking for a certain reason (e.g., incarceration).
Because of the imprecise nature of exposure information, the following two qualifying terms are suggested for a finding of prenatal alcohol exposure:
Prenatal exposure to alcohol alone is not sufficient to warrant a diagnosis of FAS. Despite the heterogeneity of expression for features related to prenatal exposure to alcohol, a diagnosis of FAS requires documentation of three findings: 1) three specific facial abnormalities; 2) growth deficit; and 3) CNS abnormalities (Appendix) (30,31) (Box).
Considerations When Diagnosing FAS
Because FAS is a syndrome rather than a specific disease, additional features can be present. For example, in addition to the key facial dymorphic features, maxillary hypoplasia is often noted for persons with FAS (3). Features often change with age or development. After puberty, the characteristic facial features associated with FAS can become more difficult to detect (32). However, the key features remain constant for the majority of persons with FAS (33,34).
Changes in growth pattern across development also lead to variability in presentation. For certain affected persons, growth problems might occur at a younger age but not be present at the time of the diagnostic evaluation. This is particularly important when considering prenatal growth retardation or early growth problems caused by failure to thrive. Because multiple treatments exist for growth problems (e.g., use of feeding tubes or hormone therapy), any history of growth retardation, including prenatal growth deficiencies, is consistent with the criteria for diagnosing FAS (35). The clinician should be certain that the child was not nutritionally deprived at the single point in time when the growth deficit was present. The adopted threshold for growth (<10th percentile) represents an attempt to maximize sensitivity, even though it reduces specificity.
The diagnostic criteria for CNS abnormality require documentation of one of three types of deficits or abnormalities (i.e., structural, neurologic, and functional). A person might have more than one CNS abnormality (36). Identifying CNS abnormalities resulting from prenatal alcohol exposure can be the most difficult aspect of a FAS diagnosis because of the heterogeneity of expression for these deficits across persons (Appendix).
Approximately one fourth of persons who receive a diagnosis of FAS perform at two standard deviations below the mean (which approaches substantial impairment [i.e., mental retardation]) on standardized measures of cognition (37). To capture the full spectrum of effects adequately, two levels of functional deficits are consistent with the criteria for a CNS abnormality: 1) performance below the third percentile (i.e., two standard deviations below the mean) on a measure of global cognitive functioning or 2) performance <16th percentile (i.e., one standard deviation below the mean) on standardized measures of three functional domains. Thus, persons scoring below the normal range on a global measure of intelligence or development and persons scoring in the below-average range on standardized measures of three specific functional domains would be consistent with the criteria for functional CNS abnormality for diagnostic purposes.
Because of the importance of documenting CNS abnormalities and the variability in functional deficits, the diagnostic process should include a thorough neuropsychologic evaluation that assesses multiple domains. Extensive standardized testing might not be readily available in all diagnostic settings. Clinicians are encouraged to supplement their observations by obtaining standardized testing through early intervention programs, public schools, and psychologists in private practice. Such testing will facilitate the development of appropriate personalized treatment plans for persons who receive a diagnosis of FAS. These guidelines recommend that functional domains be assessed by using norm-referenced standardized measures. Assessments should be conducted by professionals using reliable and validated instruments.
Individual dysmorphic features are not unique to any particular syndrome. Even rare defects or certain clusters of dysmorphic features can appear in multiple syndromes. Therefore, a process of differential diagnosis is essential in making an accurate FAS diagnosis. Features that discriminate these disorders from FAS have been described (38). Certain syndromes have single overlapping features with FAS. With the exception of toluene embryopathy, no other known syndrome has the full constellation of small palpebral fissures, thin vermillion border, and smooth philtrum. However, for certain syndromes (e.g., Williams syndrome, Dubowitz syndrome, or fetal dilantin syndrome), the overall constellation of features (primary, occasional features, or both) is similar to FAS, and these syndromes should be considered in particular when completing the differential diagnosis.
Growth retardation and deficiencies occur among children, adolescents, and adults for multiple reasons. Insufficient nutrition could be a particular problem for infants with poor sucking responses who fail to thrive. In addition, certain genetic disorders result in specific growth deficiencies (e.g., dwarfism). Prenatal growth retardation can result from multiple factors, including maternal smoking or other behaviors leading to hypoxia, poor maternal nutrition, or genetic disorders unrelated to maternal alcohol consumption. Both environmental and genetic bases for growth retardation should be considered for differential diagnosis when considering a FAS diagnosis. Finally, because a threshold of <10th percentile (rather than the lower threshold of the third percentile commonly used to denote growth retardation) was adopted, certain children will be classified as being consistent with this criterion for reasons other than prenatal exposure to alcohol (e.g., parents having short stature). However, because the diagnosis of FAS is made only when facial dysmorphia and CNS abnormalities also are present, the increased sensitivity achieved with the 10th percentile was selected.
Differential diagnosis of CNS abnormities involves not only ruling out other disorders but also specifying simultaneously occurring disorders. CNS deficits associated with FAS (especially functional deficits) can be produced by multiple factors in addition to prenatal alcohol exposure. Observed functional deficits should be determined not to be better explained by other causes. In addition to other organic syndromes that produce deficits in one or more of the previously cited domains (e.g., Williams syndrome and Down syndrome), disrupted home environments or other external factors can produce functional deficits in multiple domains that overlap those affected by FAS. In making a differential diagnosis of FAS, the clinician should evaluate CNS abnormalities in conjunction with dysmorphia and laboratory findings. CNS abnormalities resulting from environmental influences (e.g., abuse or neglect, disruptive homes, and lack of opportunities) are harder to differentiate. To assist with differential diagnosis between FAS and environmental causes for CNS abnormalities, clinicians should obtain a complete, detailed history for the person and family members.
In addition to ruling out other causes for CNS abnormalities, a complete diagnosis should identify and specify other disorders that can coexist with FAS (e.g., autism, conduct disorder, or oppositional defiant disorder). A particular person might have a conduct disorder in addition to FAS; however, not all persons with FAS have conduct disorders, and not all persons with conduct disorders have FAS. Certain functional deficits might lead to additional behavior problems. For example, a child with an attention problem also could have conduct disorder. Clinicians should consider organic causes, environmental contributions, and comorbidity for both inclusive and exclusive purposes when evaluating a person for a FAS diagnosis (32,39). Because differential diagnosis for CNS abnormalities within a FAS diagnosis is difficult, the evaluation should be conducted by professionals trained in both the features of FAS and those of a broad array of birth defects and developmental disabilities.
Conditions Consistent with a Subset of Diagnostic Criteria for FAS
The majority of persons with deficits resulting from prenatal exposure to alcohol do not express all the features necessary for a FAS diagnosis (36). Sufficient scientific evidence is not available to define diagnostic criteria for any prenatal alcohol-related condition other than FAS. Persons who have the neurodevelopment deficits required for a FAS diagnosis but who do not have all three facial features or growth deficits might not receive a diagnosis and so not be provided with services. Ongoing funding has been provided by the National Institute on Alcohol Abuse and Alcoholism to conduct research that might lead to evidence-based diagnostic criteria for persons with other conditions caused by prenatal alcohol use. CDC is using a collaborative database of neurodevelopment data from five intervention studies to explore the nature of persons who could be considered in the diagnostic category of alcohol related neurodevelopment disorder, as well as data from a prospective cohort study in Denmark of children aged 5 years. FAS is the only diagnostic category with scientific evidence to support clinical criteria at this time. As future data become available, these guidelines can be refined and expanded to delineate other conditions resulting from prenatal alcohol exposure.
Mental Health Problems and Other Lifelong Consequences
FAS has lifelong consequences. Common FAS-related mental health conditions (excluding attention problems) reported include conduct disorders, oppositional defiant disorders, anxiety disorders, adjustment disorders, sleep disorders, and depression (37,40--44). Although attention problems can be classified as a mental health issue or psychiatric condition, in these guidelines, they are treated as a primary deficit resulting from alcohol-related CNS damage rather than a secondary mental health concern (45). Decreased adaptive skills and increased problems with daily living abilities have been documented (e.g., dependent living conditions, disrupted school experiences, poor employment records, and encounters with law enforcement, including incarceration) among persons with FAS (37). These mental health--related consequences should not be used for diagnosis. However, they are prevalent among persons with FAS and are likely to result in referral and comprehensive diagnostic evaluation.
Providers of medical, educational, and social services often must decide whether to refer a child, person, or family to a specialist for a full FAS diagnostic evaluation. This decision can be difficult. For biologically related family members, social stigma might be associated with any evaluation concerning prenatal alcohol exposure. In adoptive or foster families, alcohol use during pregnancy might be suspected, but direct information might not be available.
The following guidelines were developed to assist service providers in making referral decisions. Each case should be evaluated individually. When in doubt, providers should refer persons for a full evaluation by a multidisciplinary team with experience in evaluating prenatal alcohol exposure.
The following circumstances should prompt a diagnostic referral:
--- any report of concern by a parent or caregiver (e.g., foster or adoptive parent) that a child has or might have FAS;In addition to specific features associated with a FAS diagnosis, certain social and family history factors have been associated with prenatal alcohol exposure (46). The possibility of prenatal alcohol exposure should be considered fully for persons who are experiencing or have experienced one or more of the following:
Although such situations might have a negative impact on the development of any child, evidence exists that children with FAS or a related disorder are particularly likely to experience negative situations that involve a dysfunctional family unit (46), especially if the biologic mother abuses alcohol.
Services for Persons with FAS
For persons with developmental disabilities and their families, diagnosis is never an endpoint. This is particularly true for persons with FAS, their families, and their communities. The diagnostic process (especially the neuropsychologic assessment) should be part of a continuum of care that identifies and facilitates appropriate health-care, education, and community services. Early diagnosis and a stable, nurturing home environment have been identified as strong protective factors for persons with FAS (46). Limited information is available regarding strategies for interventions specific to persons with FAS. Information available has been gathered primarily from the experience of persons with other disabilities and from that of parents gained through trial and error and shared through informal networks. Treatments currently employed to reduce the risk for adverse effects of FAS have not been evaluated systematically or scientifically. In 2001, CDC provided the first federal funding to develop and test systematic, scientifically developed interventions specific to FAS (e.g., a modified mathematics curriculum or a program to develop peer friendship skills). These projects are in their final stages, and findings will be published.
The learning and life skills affected by prenatal alcohol exposure vary among persons, depending on the amount, timing, and pattern of exposure and on each person's current and past environment (47,48). As a result, services needed for persons with FAS and their families vary according to the parts of the brain affected, the person's age or level of maturation, the health or functioning of the family, and the person's overall living environment. Thus, the service needs of affected persons and their families should be individualized (49). Certain general areas of service and specific services have been identified as helpful to persons with FAS and their families (32).
Interventions should include strategies that stabilize home placement and improve parent-child interaction (47). One means of accomplishing this goal is to increase the understanding of the disorder among parents, teachers, law enforcement personnel, and other professionals who might become involved with the affected person. Children with FAS often need specialized parenting techniques because of their difficulty with cause-and-effect reasoning and other executive functioning skills (47). Caregiver education should highlight and explain differences in the thought processes of children with FAS compared with typically developing children and children with other developmental disabilities. This knowledge would enable parents to avoid potentially difficult situations (e.g., overly stimulating environments) and better manage problems when they do arise. Overall, a better functioning family that results from caregiver education promotes the stable, nurturing home that has been demonstrated to be a protective factor for children with FAS (50).
Professionals who work with persons affected by FAS could benefit from better understanding of the disorder and services available for affected persons and their families (39). These professionals can help link families with needed community resources and ensure that affected children receive maximum benefit from services provided. Interacting with social and educational service agencies can be overwhelming and confusing, and each agency typically uses a specialized vocabulary (i.e., jargon) that is difficult for nonspecialists to understand. In addition to being able to diagnose FAS, clinicians should help parents and caregivers identify available services, determine which ones are effective for their children, and understand how to work productively with service providers (32).
Prenatally exposed infants and children often enter the foster or adoptive care system at an early age. The prevalence of children with FAS or a related disorder in the foster care system is estimated to be 10 times that of the general population (51). Although PSAs might have information regarding a child's prenatal history, PSA staff generally do not know about FAS, understand how FAS affects the child, or communicate with other service systems regarding the child's FAS status (51). As a result, foster and adoptive families typically are not educated regarding the long-term effects of FAS and are unprepared to meet their children's needs.
The majority of PSAs require foster parents to take a specified number of educational courses annually. These courses should include education regarding the effects and developmental needs of children with FAS because the majority of foster parents will encounter at least one child with FAS or a related disorder during their time as a foster parent (51). Projects funded by CDC have developed FAS curricula for parents, educators, and juvenile justice systems; information regarding these curricula is available at http://www.cdc.gov/ncbddd/fas/awareness.htm.
The assessment process is integral to both the FAS diagnosis and the development of an effective treatment plan. Such a treatment plan minimizes risk factors for lifelong negative consequences and promotes protective factors that maximize developmental potential. Clinicians and service providers must ensure that assessments include communication and social skills, emotional maturity, verbal and comprehension abilities, language usage, and, if appropriate, referral for medication assessments. Finally, the health and development of children with disabilities, including children with FAS, can be promoted by public support for programs that provide access to school, recreational, and social activities.
Alcohol Use During Pregnancy
Because no safe threshold of alcohol use during pregnancy has been established, CDC and NTFFAS/FAE recommend that women who are pregnant, planning a pregnancy, or at risk for pregnancy should not drink alcohol. Women of childbearing age who are not pregnant should drink no more than seven drinks per week and no more than three drinks on any one occasion.
Federal, state, and local agencies; clinicians and researchers; educational and social service professionals; and families should work together to educate women of childbearing age and communities countrywide regarding the risks of drinking alcohol during pregnancy. Women who have had at least one child with FAS are at especially high risk for giving birth to a second affected child (2,52). Universal screening for alcohol use among all women of childbearing age might help identify women who drink above recommended levels as well as those who drink and might become pregnant. Screening can be performed in clinicians' offices or in community health settings. Screening techniques that include measures of quantity, frequency, and heavy episodic drinking, as well as behavioral manifestations of risk drinking, have proven to be most beneficial; simple questionnaires have been developed to screen for problematic alcohol use among adults in multiple populations and settings (53).
Effective prevention programs frequently employ a multicomponent approach that combines cognitive-behavioral techniques with norms clarification, education, and motivational enhancement interventions. For women who screen positive for hazardous alcohol use or abuse, brief interventions that use time-limited, self-help, and preventative strategies to promote reductions in alcohol use in nondependent persons and that facilitate referral of dependent persons to specialized treatment programs are low-cost, effective treatment alternatives (54--57). The acronym FRAMES is used to encompass six key elements of the majority of successful brief interventions as follows: 1) feedback of personal risk, 2) responsibility for personal control, 3) advice to change, 4) menu of ways to reduce or stop drinking, 5) empathetic counseling style, and 6) self-efficacy or optimism regarding reducing or stopping drinking (58). Preconception counseling of women of childbearing age who are at risk for an alcohol-exposed pregnancy and who are not using effective contraception has been demonstrated as a promising method of prevention (59). Project CHOICES, funded by CDC, is an example of a brief intervention that has been effective. Information regarding this project and other federally sponsored studies of prenatal alcohol screening and intervention programs is available at http://www.cdc.gov/ncbddd/fas, http://www.niaaa.nih.gov, http://www.fascenter.samhsa.gov, and http://www.preventiveservices.ahrq.gov.
Summary of Recommendations
On the basis of a review of current scientific and clinical evidence, the following recommendations are made concerning referral of children and diagnosis of FAS:
Diagnosis of FAS
--- a parent or caregiver (foster or adoptive parent) reports that a child has or might have FAS;
--- premature maternal death related to alcohol use (either disease or trauma),
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Date last reviewed: 10/20/2005