Children exposed to their mother's high blood pressure drugs in the womb may be more at risk for attention-deficit hyperactivity disorder (ADHD), experts say. Researchers in the Netherlands studied 4,000 patients from 12 hospitals and found that those whose mothers had taken the drug labetalol were twice as likely to develop ADHD than kids whose mothers had taken methyldopa. They were also four times as likely to develop ADHD as children whose mothers had been prescribed bed rest in order to...