2.Alfirevic, Z, Devane, D, Gyte, GML. Continuous cardiotocography (CTG) as a form of electronic fetal monitoring (EFM) for fetal assessment during labour. Cochrane Database Syst Rev 2006;(3):CD006066.
5.Lucas, DN, Yentis, SM, Kinsella, SM, et al. Urgency of caesarean section: a new classification. J R Soc Med 2000;93:346–50.
10.Fernando, RJ, Sultan, AH, Kettle, C, Thakar, R. Methods of repair for obstetric anal sphincter injury. Cochrane Database Syst Rev 2013;(12):CD002866.
12.Revelle, K, Morrish, P. Headaches in pregnancy. Obstet Gynaecol 2014;16(3):179–84.
13.Zhang, J, Geerts, AC, Hukkel Hoven, BC,et al. Caesarean section rates in subgroups of women and perinatal outcomes. Brit J Obstet Gynaecol 2016;123:754–61.