The growth and development of children exposed in utero to the atomic bombs in Hiroshima and Nagasaki.

Abstract
Subjects who were exposed in utero to the atomic bombs in Hiroshima and Nagasaki, along with suitable controls, are examined annually at the Atomic Bomb Casualty commission. At age 17 years, 1259 of the 1613 subjects in the study sample were examined and a tendency was observed for the proximal exposed to be least advanced in growth. The major effects are found most frequently in those who had been within 1500 meters from the hypocenters of the bombs and include decreased head circumference, height, and weight. The levels of these effects do not vary by trimester of gestation.