INCREASED VULNERABILITY TO ALCOHOL-RELATED BIRTH-DEFECTS IN THE OFFSPRING OF MOTHERS OVER 30

The risk of fetal alcohol syndrome (FAS) is known to increase with Inc reased maternal age and parity. This study investigated the hypothesis that the deficits in growth and intellectual function seen in non-FAS infants exposed to alcohol at moderate-to-heavy levels are also found disproportionately in the offspring of older mothers. Mothers of 480 African-American, inner-city infants were interviewed at each prenatal clinic visit regarding their use of alcohol during pregnancy. Infants were assessed for physical growth and cognitive development repeatedl y through age 13 months. In analyses run separately for the infants of younger and older mothers, alcohol-related deficits were seen most st rongly in the offspring of women over 30 years of age. This pattern wa s not caused by lower levels of drinking by the younger mothers. Age-r elated increases in maternal body fat-to-water ratio and a faster rate of alcohol metabolism in chronic drinking women may account for the g reater vulnerability of the offspring of the older mothers. These data suggest that physiological changes associated with aging and/or chron ic drinking may play an important role in the alcohol-related birth de fects seen in infants exposed at moderate-to-heavy levels.