"The first tenet of medicine is to do no harm, and the price of caution here is small. Our results should temporarily serve to introduce this caution so that male IBD patients should stop 6MP 2–3 months before impregnation, restart the drug after the wife conceives, but restart the drug earlier if there is an exacerbation before impregnation. Almost certainly we will eventually learn that women with IBD who are on 6MP should also stop the drug at some time before conception, although, in this situation, pregnancy should not even be initiated in the presence of active disease. Using the terminology introduced by Dr. Kane “what’s good for the goose should be good for the gander”, we would paraphrase her title with “what’s bad for the gander should also be bad for the goose