A Difficult Birth May Put a Baby at Greater Risk

Multiple Choice

A difficult birth may put a baby at greater risk for autism, according to a study that may provide clues to the causes of the devastating neurological disability. The Centers for Disease Control and Prevention said that in a study of 698 Danish children who had the developmental disorder (autism) , researchers found a disproportionately high number had been born before the 35^th week of pregnancy, had suffered from low birth weights and were in a breech position at birth. What type of study is this?

A) Retrospective
B) Prospective