Notes that, despite gains in eliminating lead sources, there are still detectable effects from low-level exposure. Discusses at what level of exposure the adverse effects of lead become trivial and what measures, if any, should be taken to reduce low-level exposure. (HTH)

Examined the relationship between maternal cigarette smoking during pregnancy and children's intellectual functioning through age four. Found that children whose mothers smoked 10 or more cigarettes per day during pregnancy had Stanford-Binet scores 4 points lower than those whose mothers did not smoke during pregnancy. (HTH)

Analyzed the influence of a comprehensive program of nurse home visitation on the intellectual functioning of children born to women who smoked cigarettes during pregnancy. Found that comprehensive home-visitation services before and after delivery can offset the impairment in intellectual functioning associated with substantial maternal smoking…

Developmental data on 612 home reared, Down's Syndrome children, from birth through 16 years of age, were collected over 20 years from an outpatient clinic for mentally retarded children and were statistically analyzed to ascertain normative times of motor, language and intellectual developmental behaviors. (Author/MC)