Hereditary ovarian cancer syndrome refers to an inherited genetic condition that significantly raises a person's lifetime risk of developing ovarian cancer.
Cancer Research
Genomic Testing
Precision Medicine
Share this BLOG article
Approximately 15–20% of ovarian cancers are linked to inherited genetic mutations, with the majority caused by mutations in the BRCA1 or BRCA2 gene. Women with a BRCA1 mutation face a lifetime ovarian cancer risk of up to 44%, compared to roughly 1.2% in the general population.
If ovarian cancer has appeared in your family, whether it was your mother, sister, aunt, or grandmother, it is worth finding out whether an inherited mutation might be part of the picture. Genetic testing can tell you whether you carry that risk, and knowing changes what you can do about it, from how often you are monitored to which protective options are available to you.
This guide explains what inherited ovarian cancer is, which genes are involved, how to read your family history, and what your next steps might look like.
Lifetime Ovarian Cancer Risk
Risk Group
Lifetime Risk
Clinical Significance
General Population
1.2%
No identified hereditary mutation. Standard gynecologic screening applies.
Lynch Syndrome Carrier
4–12%
Gynecologic monitoring is recommended alongside colorectal surveillance.
BRIP1 Mutation Carrier
5–10%
Risk-management discussions with a physician are recommended.
BRCA2 Mutation Carrier
11–17%
HBOC syndrome. Enhanced surveillance and risk-reduction options are available.
BRCA1 Mutation Carrier
36–44%
Highest hereditary ovarian cancer risk in this group. Risk-reducing surgery is often part of the clinical discussion.
General Population
1.2%
Clinical Significance
No identified hereditary mutation. Standard gynecologic screening applies.
Lynch Syndrome Carrier
4–12%
Clinical Significance
Gynecologic monitoring is recommended alongside colorectal surveillance.
BRIP1 Mutation Carrier
5–10%
Clinical Significance
Risk-management discussions with a physician are recommended.
BRCA2 Mutation Carrier
11–17%
Clinical Significance
HBOC syndrome. Enhanced surveillance and risk-reduction options are available.
BRCA1 Mutation Carrier
36–44%
Clinical Significance
Highest hereditary ovarian cancer risk in this group. Risk-reducing surgery is often part of the clinical discussion.
Yes, Ovarian Cancer Can Be Hereditary, and It's More Common Than Most People Know
Most people think of cancer as being driven mainly by lifestyle choices, environmental exposure, or just bad luck. And for most cancers, that's largely true. But ovarian cancer is different. A higher proportion of ovarian cancer cases have a hereditary cause than almost any other cancer type.
Across cancer types overall, inherited genetic changes are estimated to play a role in about 5 to 10 percent of cases. In ovarian cancer, that number is higher, closer to 15 to 20 percent. That means roughly 1 in 5 women diagnosed with ovarian cancer may carry an inherited genetic mutation that caused or strongly contributed to the disease.
What Makes Ovarian Cancer Hereditary vs. Sporadic?
When we say a cancer is hereditary, we mean it was caused by a germline mutation. That is a change in the DNA that a person is born with, inherited from one of their parents, and present in every cell in the body from the very beginning. Because this mutation exists throughout the body, it affects the body's ability to suppress tumor growth over an entire lifetime.
Sporadic ovarian cancer, which accounts for roughly 75–90% of cases, develops due to DNA changes that accumulate over time, often triggered by factors like age, hormone exposure, or random replication errors. These cases are not inherited and do not typically follow a family pattern.
How Common Is Hereditary Ovarian Cancer?
Inherited Ovarian Cancer
Key Statistics
Why family history is a critical clinical indicator
15–20%
of ovarian cancers are hereditary
American Cancer Society
44%
lifetime ovarian cancer risk for BRCA1 mutation carriers
NCI BRCA Fact Sheet
11–17%
lifetime ovarian cancer risk for BRCA2 mutation carriers
NCI BRCA Fact Sheet
According to the American Cancer Society, approximately 15–20% of ovarian cancers are caused by inherited mutations. Mutations in the BRCA1 and BRCA2 genes account for the majority of these, roughly 10–15% of all ovarian cancer cases. The remaining hereditary cases are caused by mutations in other genes, including those associated with Lynch syndrome. (American Cancer Society)
This is why family history matters so much when it comes to ovarian cancer, and why genetic testing is clinically recommended for women who meet certain criteria.
Which Genes Are Linked to Inherited Ovarian Cancer Risk?
Several genes have known mutations that are associated with an elevated hereditary risk of ovarian cancer. The specific gene involved matters because it affects how high the risk is, which other cancers might also be elevated, and what monitoring or protective options make sense.
BRCA1 and BRCA2: The Genes Most Commonly Linked to Hereditary Ovarian Cancer Risk
BRCA1 and BRCA2 are tumor suppressor genes. When functioning normally, they help repair damaged DNA and prevent cells from growing uncontrollably. Think of them as the body's built-in quality control system. When either gene has a harmful mutation, this protective function is compromised, and the risk of ovarian and breast cancer rises significantly.
BRCA1: Lifetime ovarian cancer risk of approximately 36–44%, compared to 1.2% in the general population. Also associated with significantly elevated breast cancer risk (up to 72% lifetime risk). (NCI, BRCA Fact Sheet)
BRCA2: Lifetime ovarian cancer risk of approximately 11–17%. Associated with elevated breast and pancreatic cancer risk in both women and men, as well as elevated risk for prostate cancer in men.
Hereditary Breast and Ovarian Cancer syndrome, or HBOC, caused by BRCA1 and BRCA2 mutations, is one of only three conditions designated as a CDC Tier 1 Genomic Application, meaning there is strong scientific evidence supporting genetic screening and clear steps available when a mutation is found. (CDC Genomics)
Other Genes That Elevate Ovarian Cancer Risk
While BRCA1 and BRCA2 mutations are the most common causes of hereditary ovarian cancer, mutations in several other genes are associated with elevated risk:
Lynch syndrome genes (MLH1, MSH2, MSH6, PMS2): Primarily associated with colorectal cancer, Lynch syndrome also raises ovarian cancer risk, estimated at 4–12% lifetime risk depending on the specific gene. Women with Lynch syndrome are often recommended for gynecologic surveillance in addition to colonoscopy. (American Association for Cancer Research)
BRIP1: Associated with moderate ovarian cancer risk, estimated 5–10% lifetime risk, compared to 1.2% in the general population. Current guidelines recommend risk management discussions.
RAD51C and RAD51D: Increasingly recognized as moderate-risk ovarian cancer genes, with growing evidence supporting risk management recommendations for carriers.
PALB2: Primarily associated with breast and pancreatic cancer risk, with emerging data suggesting moderate ovarian cancer risk elevation
A comprehensive hereditary cancer panel tests for all of these genes at once from a single sample. This is why panel testing, rather than testing one gene at a time, is now the standard approach when hereditary ovarian cancer risk is a concern.
What Is Your Risk If Ovarian Cancer Runs in Your Family?
Family history is the strongest clinical indicator for hereditary ovarian cancer risk, and it is also the most underutilized one. Most people do not know enough about their family's medical history to accurately assess their own risk, and many healthcare providers do not have time to explore it thoroughly during standard appointments.
How Your Relationship to an Affected Relative Affects Your Risk
The closer the biological relationship, the more genetic material you share with that person, and the more significant the risk signal.
First-degree relatives (mother, sister, daughter) share approximately 50% of their DNA.
Second-degree relatives (grandmother, aunt, half-sister) share approximately 25% of their DNA.
One first-degree relative with ovarian cancer is a meaningful indicator of increased risk. Two or more affected relatives, especially across different generations, more strongly suggest that a hereditary mutation may be present in the family. In families where a BRCA mutation is known, each first-degree relative of the affected person has a 50% chance of having inherited the same mutation.
Family History Patterns Worth Paying Attention To
The American Cancer Society and National Cancer Institute identify several family history patterns that suggest a hereditary cancer syndrome may be present. These include:
A mother, sister, or daughter diagnosed with ovarian cancer at any age
The same person having both breast cancer and ovarian cancer
A close relative diagnosed with breast cancer before age 50
Male breast cancer in any family member
Multiple family members on the same side with breast, ovarian, pancreatic, or prostate cancer
Ovarian cancer in two or more relatives on the same side of the family
Ashkenazi Jewish ancestry (approximately 1 in 40 individuals of Ashkenazi Jewish descent carry a potentially harmful BRCA1 or BRCA2 mutation)
If any of these patterns apply to your family, genetic counseling and testing are worth discussing with a genetic counselor. Your genetic information is private and protected, accessible only to you and your care team.
Get clarity on your inherited ovarian cancer risk.
Kadance members receive access to hereditary cancer risk testing covering 26 clinically actionable genes, including BRCA1, BRCA2, and primary Lynch syndrome genes, through our CAP-accredited, CLIA-certified laboratory. Your results are handled securely, and your privacy is protected in accordance with HIPAA.
Should You Get Genetic Testing for Ovarian Cancer Risk?
For individuals with a family history that suggests hereditary risk, genetic testing is not an extreme step; it is an evidence-based one. Current guidelines from the American Cancer Society, National Comprehensive Cancer Network (NCCN), and other major clinical bodies recommend hereditary cancer genetic testing for individuals who meet specific family history criteria.
Who Qualifies for Hereditary Ovarian Cancer Risk Genetic Testing?
Clinical guidelines generally recommend hereditary cancer risk testing for individuals who have:
A personal history of ovarian cancer at any age
A first-degree relative with ovarian cancer
A first-degree relative with a BRCA1 or BRCA2 mutation
A personal or family history pattern consistent with HBOC syndrome or Lynch syndrome
Ashkenazi Jewish ancestry combined with any personal or family cancer history
You do not need a cancer diagnosis to pursue testing. Many people pursue genetic testing proactively, particularly those with multiple risk factors or strong family history patterns, because learning this information early can help support more informed conversations with a doctor about screening, prevention, and next steps.
What the Testing Process Looks Like
Hereditary ovarian cancer risk testing starts with a simple sample, typically a cheek swab, saliva sample, or blood draw. That sample is sent to a laboratory where scientists analyze your DNA across a panel of relevant genes, covering BRCA1, BRCA2, Lynch syndrome genes, and several other moderate-risk genes, all from a single test.
Results are typically returned in two categories: positive, meaning a harmful inherited gene change was identified, or negative, meaning no harmful gene change was found in the tested genes. Some laboratories also report variants of uncertain significance, a DNA change where current science does not yet have enough evidence to say whether it is harmful or not. Not all labs report these, since they are not clinically actionable. A genetic counselor interprets your results in the context of your personal and family history and helps you understand what they mean.
What to Do If You Test Positive for an Inherited Ovarian Cancer Gene Mutation
A positive result, meaning a harmful inherited gene change was found in BRCA1, BRCA2, or another ovarian cancer risk gene, is significant. But it is also something you can act on. Knowing you carry a mutation opens options that are simply not available to people who do not know their status. Clinical options, always discussed with and managed by a physician, may include:
Enhanced surveillance: Regular appointments with a gynecologic oncologist, typically including a transvaginal ultrasound and a CA-125 blood test on a schedule tailored to your specific mutation. It is worth knowing that for BRCA carriers, surveillance alone has limited effectiveness for catching ovarian cancer early. Risk-reducing surgery, described below, is often considered the more protective option.
Risk-reducing salpingo-oophorectomy (RRSO): SSurgical removal of the fallopian tubes and ovaries, known as risk-reducing salpingo-oophorectomy, is currently the most effective way to lower ovarian cancer risk for BRCA1 and BRCA2 carriers.Timing and implications are discussed in detail with a gynecologic oncologist.
Chemoprevention: Oral contraceptives have been associated with reduced ovarian cancer risk in BRCA1/BRCA2 mutation carriers, though benefits and risks should be reviewed on an individual basis.
Informing family members: A positive result has implications for your biological relatives. A genetic counselor can help you navigate how and when to share this information with family members who may want to know.
If you test positive, monitoring does not stop at ovarian cancer. BRCA carriers also need breast cancer surveillance.
Lynch syndrome carriers also need colorectal and endometrial monitoring. A genetic counselor and the right specialists work together to build a plan that covers the full picture.
Take control of your health by understanding your inherited risk.
Through a Kadance membership, individuals receive access to hereditary cancer risk testing, genetic counseling to interpret positive results, and a clinical foundation for informed conversations with their care team.
Genetic testing is part of a broader category of cancer genetic screening tests that help identify risk before symptoms appear.
Common Questions About Inherited Ovarian Cancer Risk
Can ovarian cancer skip a generation?
An inherited mutation can be present in a family member who never develops cancer, because carrying the mutation does not guarantee a diagnosis. If your grandmother carried a BRCA mutation but never developed ovarian or breast cancer, her children and grandchildren could still have inherited it. This is one of the reasons family history alone does not always reveal the full picture, and why genetic testing can uncover risk that appears to have skipped a generation.
Does a BRCA mutation always lead to ovarian cancer?
No. Carrying a BRCA1 or BRCA2 mutation significantly elevates the lifetime risk of ovarian cancer, but it does not guarantee cancer will develop. Many people with BRCA mutations live their full lives without developing ovarian or breast cancer. The mutation creates a biological vulnerability, not a certainty. The value of knowing is that it enables proactive monitoring and risk-reduction conversations with a physician, options unavailable to people who don't know their status.
Can men carry hereditary ovarian cancer gene mutations?
Yes. Men can carry BRCA1 and BRCA2 mutations and can pass them to their children, including daughters who face elevated ovarian cancer risk. Male BRCA mutation carriers also face elevated risks of their own, particularly breast cancer and prostate cancer for BRCA2 mutation carriers, and pancreatic cancer for both. A father who carries a BRCA mutation has a 50% chance of passing it to any biological child, regardless of the child's sex.
Understanding Your Risk Is the First Step
If ovarian cancer has appeared in your family, one of the most useful things you can do is learn whether you carry an inherited mutation that increases risk, before a diagnosis makes that conversation urgent. Most people who carry inherited cancer mutations don't know it. That isn't a failure of awareness; it's a gap in the structure of traditional healthcare.
Proactive genetic risk assessment fills that gap. It turns a family history concern into clinical information, the kind that can be acted on, monitored, and discussed with a health professional who can put it in context.
Understand your risk. Support your family.
Learn how a Kadance membership can connect you to hereditary cancer risk testing, genetic counseling, and the precision health infrastructure to make informed decisions about your health, not reactive ones.
.svg)
