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About 5% of ovarian cancers are caused by an inherited faulty gene; inherited genes that increase the risk of ovarian cancer include BRCA1 and BRCA2. the same genes that increase the risk of breast cancer.
As you have a very close relative (your mother) who has had ovarian cancer, yes you may be more at risk of developing ovarian cancer, and as your mother was under 50 when hers was diagnosed, it is more likely that it is due to an inherited faulty gene.
I think you should definitely talk to your doctor about genetic testing. But remember, even if your mother does have the faulty gene, it doesn't mean you will have it, and even if you do it doesn't mean you will definitely get cancer.
Good luck.
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