The title of the post is a copy and paste from the title and first paragraph of the linked academic press release here:
Early postpartum opioids linked with persistent usage
Vanderbilt researchers have published findings indicating that regardless of whether a woman delivers a child by cesarean section or by vaginal birth, if they fill prescriptions for opioid pain medications early in the postpartum period, they are at increased risk of developing persistent opioid use.
Sarah S. Osmundson, Andrew D. Wiese, Jea Young Min, Robert E. Hawley, Stephen W. Patrick, Marie R. Griffin, Carlos G. Grijalva.
Delivery Type, Opioid Prescribing, and the Risk of Persistent Opioid Use After Delivery.
American Journal of Obstetrics and Gynecology, 2018;