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Concern has been expressed that exposure to fertility drugs might be associated with a risk of ovarian cancer. We have examined the incidence of breast and ovarian cancer in a cohort of 10 358 women referred for in-vitro fertilisation (IVF) treatment in Victoria, Australia, between 1978 and 1992. The 'exposed' group (n=5564) had had ovarian stimulation to induce multiple folliculogenesis and the 'unexposed'...
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