Astudy was conducted among men in the united states in order to find out whether a mother’s use of hormones during her pregnancy affected her son’s risk of developing testicular cancer. investigators selected 1000 men who were hospitalized for testicular cancer, and 1000 men of similar ages hospitalized for other, non-cancer conditions. the study found that of the men with testicular cancer, 350 of their mothers had used hormones during that pregnancy; and of the men with other non-cancer conditions, 150 of their mothers had used hormones during pregnancy.