Does morphine sleep prolong latent labor?

Abstract

Does morphine sleep prolong latent labor? Evidence-Based Answer: The answer is unknown. However, approximately 62% of patients with latent labor treated with morphine sleep will then be admitted for labor. Patients who are at term, primigravid, and have cervical effacement >50% are more likely to be admitted for active labor after morphine sleep (SOR: B, retrospective cohort study).