From uptodate.com - reliable source in medical information:

• https://www.uptodate.com/contents/genetic-testing-for-hereditary-breast-ovarian-prostate-and-pancreatic-cancer-beyond-the-basics

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From the American College of Obstetricians and Gynecologists (ACOG):

• https://www.acog.org/womens-health/faqs/brca1-and-brca2-mutations​

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