Opioid use disorder and maternal outcomes following cesarean delivery: a multistate analysis, 2007-2014.

To examine the association between opioid use disorder (OUD) and maternal outcomes following cesarean delivery. Retrospective analysis of over 2.4 million discharge records for in-patient cesarean delivery across five states from 2007 to 2014.

Impact of cervical effacement and fetal station on progress during the first stage of labor: a biexponential model.

Objective: To develop a model that uses cervical effacement, fetal station, and parity to predict progress during the first stage of labor.

Study Design: This was a secondary analysis of a cohort of 1,128 parturients delivering after 34 weeks. Timed cervical exams from each patient were fit with a biexponential model.