No cancer risk from IVF drugs: study
The results appear to contradict a number of studies in recent years that suggested such treatments may increase the risk of the disease.
Safety questions have been raised about the use of clomiphene, gonadotropins and follicle stimulating hormone because they boost levels of oestradiol and progesterone, which are thought to play a role in breast, ovarian and uterine cancer.
But the new study found "little evidence" of a higher risk linked to hormone treatment, its authors said on Monday.
Dr Humberto Scoccia from the University of Illinois at Chicago, who took part in the study, said the long-term picture was "generally reassuring".
The data comes from a 30-year study of nearly 10,000 women treated for infertility at five US clinics from 1965 to 1988.
During this period, doctors diagnosed 749 cases of breast cancer, 119 of uterine cancer and 85 of ovarian cancer among the group.
The study did find an increased risk of