1. National Institute for Health and Care Excellence. Intrapartum care for healthy women and babies. 2014, nice.org.uk/guidance/cg190.
2. Psychosocial and educational interventions in latent phase or early labour for improving birth outcomes (Protocol);Hanada;Cochrane Db Syst Rev,2015
3. Fear, pain and stress hormones during childbirth;Alehagen;J Psychosom Obstet Gynaecol,2005
4. The timing of hospital admission and progress of labour;Hemminki;Eur J Obstet Gynecol Reprod Biol,1986
5. The relationship between cervical dilatation at initial presentation in labour and subsequent intervention;Holmes;BJOG,2001