Since 1965, married fathers' time caring for children nearly tripled to an average 7.0 hours a week from 2.5; married moms' child-care time also rose, by 36%-to 13.9 hours from 10.2 hours, based on research released at a conference Tuesday in Washington, D.C. The child-care hours include only the time parents were focused mainly on the child, such as feeding, clothing, bathing, playing with or rea