Janet B. Hardy, a Johns Hopkins University pediatrics professor who led a pioneering study of mothers and children that provided a wealth of information on teen pregnancy, medical concerns and social issues, died Oct. 23 at the Glen Meadows retirement community in Glen Arm, Md. She was 92 and had had a stroke. Dr. Hardy helped design the Collaborative Perinatal Project, a wide-reaching federal study of 60,000 expectant mothers and their children, that began in 1957. She was the lead researcher for the Baltimore portion of the 12-city project, which focused largely on inner-city mothers and the physical and social development of their children. The interdisciplinary project, which officially lasted 20 years but continues to yield compelling results, combined medicine with sociology, psychology, public health and education. Dr....
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