Ort.

Next month, after 10 years of strategizing, researchers will finally start recruiting participants for the largest long-term study of children’s health ever conducted in this country. The National Children’s Study, led by the National Institute of Child Health and Human Development, plans to track 100,000 kids from the womb (a mother’s health during pregnancy will provide early clues) to the age of 21, hunting down answers to critical questions about how the complex interplay of genes and environment affects kids