Review
Delayed versus early pushing in women with epidural analgesia: a systematic review and meta-analysis.
BJOG. 2004 Dec 1;111(12):1333-40.
Randomized Controlled Trial
Pain relief by applying transcutaneous electrical nerve stimulation (TENS) on acupuncture points during the first stage of labor: a randomized double-blind placebo-controlled trial.
Pain. 2007 Feb 1;127(3):214-20.
Randomized Controlled Trial
A randomised non-inferiority controlled trial of a single versus a four intradermal sterile water injection technique for relief of continuous lower back pain during labour.
Bmc Pregnancy Childb. 2011 Jan 1;11:21.