1. Payne J. The impact of a reduced fertility rate. Canadian Institute for Health Information: Women’s Health Surveillance Report. Available from URL; http://secure.cihi.ca/cihiweb/products/CPHI_WomensHealth_e.pdf (accessed March 2008).
2. Luke B, Brown MB. Elevated risks of pregnancy complications and adverse outcomes with increasing maternal age. Human Reprod 2007; 22: 1264–72.
3. Lewis G. 2007 — The Confidential Enquiries into Maternal and Child Health. Saving Mothers’ Lives: reviewing maternal deaths to make motherhood safer — 2003–2005. The Seventh Report on Confidential Enquiries into Maternal Deaths in the United Kingdom. London: CEMACH. On-line Executive summary is available from URL: http://www.cemach.org. uk/Publications/CEMACH-Publications/Maternaland-Perinatal-Health.aspx (accessed March 2008).
4. Silversides CK, Harris L, Haberer K, Sermer M, Colman JM, Siu SC. Recurrence rates of arrhythmias during pregnancy in women with previous tachyarrhythmia and impact on fetal and neonatal outcomes. Am J Cardiol 2006; 97: 1206–12.
5. Robins K, Lyons G. Supraventricular tachycardia in pregnancy. Br J Anaesth 2004; 92: 140–3.