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Fetal Alcohol Syndrome (FAS) is characterized by a range of physical and neurodevelopmental features resulting from prenatal alcohol exposure. Key features of FAS include short palpebral fissures, which are abnormally small eyelid openings; growth retardation, leading to a smaller size at birth and throughout childhood; and clear evidence of brain involvement, which can manifest as structural brain anomalies or functional deficits.

High birth weight is not associated with FAS. In fact, children with FAS typically have lower birth weights due to the growth retardation that results from the effects of alcohol on fetal development. Prenatal alcohol exposure is detrimental to growth and can lead to various complications during pregnancy, whereas a high birth weight is often a sign of a healthy, well-nourished fetus.

Recognizing these characteristics is essential for diagnosing FAS, understanding its implications, and managing the care of affected individuals.