1. Kallen K. The impact of maternal smoking during pregnancy on delivery outcome. Eur J Pub Health. 2001;11:329–33.
2. Salihu HM, Wilson RE. Epidemiology of prenatal smoking and perinatal outcomes. Early Hum Dev. 2007;83:713–20.
3. Lifestyles Statistics Team Health and Social Care Information Centre. Statistics on Women’s Smoking Status at Time of Delivery: England April 2015 to March 2016. 2016.
https://digital.nhs.uk/data-and-information/publications/statistical/statistics-on-women-s-smoking-status-at-time-of-delivery-england
Accessed 29th Apr 2018.
4. Ford C, Greenhalgh EM, Winstanley MH. Pregnancy and smoking. In: Scollo MM, Winstanley MH, editors. Tobacco in Australia: Facts and issues. Melbourne: Cancer council Victoria; 2015.
http://www.tobaccoinaustralia.org.au/3-7-pregnancy-and-smoking
.
5. Centers for Disease Control and Prevention. Pregnancy Risk Assessment Monitoring System (PRAMS), 2011.
https://www.cdc.gov/prams/pramstat/index.html
Accessed 7th Dec 2017.