A long-term study of women who used ovary-stimulating hormones for fertility treatment found no widespread evidence of a higher cancer risk, researchers said on Monday. The forerunner, clomiphene, was gradually supplanted in the 1980s by two other groups -- human menopausal gonadotrophins and follicle stimulating hormone. In recent years, some studies raised safety questions as the drugs boost levels of the female hormones estradiol and progesterone, which are thought to play a role in breast, ovarian and uterine cancer. Humberto Scoccia from the University of Illinois at Chicago, who took part in the study, said the long-term picture was "generally reassuring."
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