1. Volume 382, Issue 9907, Pages 1807-1816 (November 2013)
The prevalence of unplanned pregnancy and associated factors in Britain: findings from the third National Survey of Sexual Attitudes and Lifestyles (Natsal-3) 
Prof Kaye Wellings, FRCOG, Kyle G Jones, MSc, Catherine H Mercer, PhD, Clare Tanton, PhD, Soazig Clifton, BSc, Jessica Datta, MSc, Andrew J Copas, PhD, Bob Erens, MA, Lorna J Gibson, MPhil, Wendy Macdowall, MSc, Pam Sonnenberg, PhD, Andrew Phelps, BA, Prof Anne M Johnson, MD 
The Lancet 
Volume 382, Issue 9907, Pages (November 2013)
DOI: /S (13)
Copyright © 2013 Wellings et al. Open Access article distributed under the terms of CC BY Terms and Conditions

2. Figure 1
Distribution of London Measure of Unplanned Pregnancy score for women with pregnancy outcome in the year before interview
The Lancet  , DOI: ( /S (13) )
Copyright © 2013 Wellings et al. Open Access article distributed under the terms of CC BY Terms and Conditions

3. Figure 2
Median age at first sexual intercourse, first live-in relationship, and first child by birth cohort
The Lancet  , DOI: ( /S (13) )
Copyright © 2013 Wellings et al. Open Access article distributed under the terms of CC BY Terms and Conditions

4. Figure 3
Behaviours relating to pregnancy risk in the year before interview, by age-group
The Lancet  , DOI: ( /S (13) )
Copyright © 2013 Wellings et al. Open Access article distributed under the terms of CC BY Terms and Conditions