In the course of our reporting, another disturbing statistic emerged: For every American woman who dies from childbirth, 70 nearly die. That adds up to more than 50,000 women who suffer "severe maternal morbidity" from childbirth each year, according to the Centers for Disease Control and Prevention. A patient safety group, the Alliance for Innovation on Maternal Health, came up with an even higher figure. After conducting an in-depth study of devastating complications in hospitals in four states, it put the nationwide number at around 80,000. "It's referred to as the tip of the iceberg because for every woman we lose, there are lots of other women that we come very close to losing," says obstetrician Peter Bernstein, the director of the Maternal-Fetal Medicine division at Montefiore Medical Center in New York.

The dangers of sporadic postpartum care may be particularly great for black mothers. African Americans have higher rates of C-section and are more than twice as likely to be readmitted to the hospital in the month following the surgery. They have disproportionate rates of preeclampsia and peripartum cardiomyopathy (a type of heart failure), two leading killers in the days and weeks after delivery. They’re twice as likely as white women to have postpartum depression, which contributes to poor outcomes, but they are much less likely to receive mental health treatment.