Prevalence of infertility in the United States as estimated by the current duration approach and a traditional constructed approach  Marie E. Thoma, Ph.D., Alexander C. McLain, Ph.D., Jean Fredo Louis, B.S., Rosalind B. King, Ph.D., Ann C. Trumble, Ph.D., Rajeshwari Sundaram, Ph.D., Germaine M. Buck Louis, Ph.D.  Fertility and Sterility  Volume 99, Issue 5, Pages 1324-1331.e1 (April 2013) DOI: 10.1016/j.fertnstert.2012.11.037 Copyright © 2013 Terms and Conditions

Figure 1 Flow chart of women included in the (A) traditional NSFG constructed measure classified by outcome, and (B) the current duration approach classified by eligibility for inclusion in the analysis. Fertility and Sterility 2013 99, 1324-1331.e1DOI: (10.1016/j.fertnstert.2012.11.037) Copyright © 2013 Terms and Conditions

Figure 2 Estimation of the proportion of women not yet pregnant as a function of the number of months trying for pregnancy among (A) all women (n = 270) and (B) nulliparous women (n = 139) who reported currently trying and their duration of pregnancy attempt. The solid curve is the survival function for the time until pregnancy or end of attempt, and the dotted curves indicate 95% CIs. The solid vertical line at 12 months corresponds to infertility estimates of (A) 15.5% (95% CI 8.6%–27.5%) and (B) 24.3% (95% CI 12.4%–43.5%) for the current duration approach. The corresponding infertility estimates represented by black circles are (A) 7.0% (95% CI 6.2%–7.8%) and (B) 13.2% (95% CI 11.2%–15.2%) according to the constructed measure. Fertility and Sterility 2013 99, 1324-1331.e1DOI: (10.1016/j.fertnstert.2012.11.037) Copyright © 2013 Terms and Conditions