By U. Michigan Kara Zivin, professor of psychiatry and obstetrics and gynecology at the University of Michigan, is part of this statistic. She studies health policy and maternal outcomes, having chronicled her own experience with depression during pregnancy in a memoir. “When I became pregnant, I wondered how my preexisting depression diagnosis and antidepressant use could affect my baby’s development in utero and after delivery,” Zivin says. “I…