A professor has been charged with second-degree murder in the death of her 6-month-old daughter. Mine An Ener (meen ahn ENN'-ur), a history professor at Villanova University in Pennsylvania, is accused of killing the child with a kitchen knife while visiting her family in Minnesota. In her confession to police, Ener said she suffered from postpartum depression. The case has women's health advocates calling for increased awareness of that condition. Ed Taylor is a professor in the School of Social Work at the University of Minnesota, and he's on the line now.