Sleeping Baby (IMAGE) University of South Australia Caption For women who choose pain relief in labour, fentanyl has been shown to reduce pain intensity while enabling women to work with the contractions. Credit Photo by Hu Chen on Unsplash Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.