1. Randomized trial of a “stage-of-change” oriented smoking cessation intervention in infertile and pregnant women 
Edward G Hughes, David A Lamont, M.D., Mary Louise Beecroft, R.N., Douglas M.C Wilson, M.D., Barbara G Brennan, M.D., Ph.D., Sarah C Rice 
Fertility and Sterility 
Volume 74, Issue 3, Pages (September 2000)
DOI: /S (00)

2. Figure 1
Stages-of-change for infertile women at initial visit, 6 months, and 12 months. With no demonstrable difference between intervention and standard of care, data from both study arms were combined. Stages-of-change were: 1) not thinking of quitting; 2) considering quitting within six months; 3) preparing to quit within one month; 4) actually quitting smoking; 5) maintained cessation.
Hughes. “Stage-of-change” smoking cessation intervention. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (00) )

3. Figure 2
Stages-of-change for pregnant women at initial visit, 6 months, and 12 months. With no demonstrable difference between intervention and standard of care, data from both study arms were combined. Stages-of-change were: 1) not thinking of quitting; 2) considering quitting within six months; 3) preparing to quit within one month; 4) actually quitting smoking; 5) maintained cessation.
Hughes. “Stage-of-change” smoking cessation intervention. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (00) )