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Breast and Ovarian Cancer Risk Assessment

The average U.S. woman has a 13% lifetime risk of breast cancer and a 1.2% risk of ovarian cancer. These are baseline risks—before considering personal factors like genetics, family history, or breast density.

Tilda helps you understand your personal risk—and what to do about it.

What is your email address?

Demographics

How old are you?

What is your height (feet / inches)

What is your weight (lbs)

higher BMI moderately increases breast cancer and ovarian cancer risk

Which of the following best describes your background?

Which of the following best describes your background?

Daily Life

drinking and smoking moderately increase your breast cancer risk

Do you smoke regularly?

Do you smoke regularly?
A
B
C

On average, how much alcohol do you drink?

On average, how much alcohol do you drink?
A
B
C

Women's Health

How old were you when you had your first period?

Getting your first period before age 12 slightly increases breast and ovarian cancer risk due to longer lifetime estrogen exposure

Have you ever taken the oral contraceptive pill?

Taking oral contraceptives slightly lowers ovarian cancer risk and may slightly increase breast cancer risk, especially with long-term use

Have you ever taken the oral contraceptive pill?
A
B
C

Have your periods now stopped completely?

Have your periods now stopped completely?
A
B
C

Have you ever used hormone replacement therapy (HRT) for menopause

Have you ever used hormone replacement therapy (HRT) for menopause
A
B
C

Hormone replacement therapy (HRT) slightly increases breast cancer risk, especially with combined estrogen and progestin

Children

Have you given birth to a child?

Have you given birth to a child?
A
B

Having your first child after age 30—or not at all—modestly increases breast and ovarian cancer risk.


Breast Screening

Have you ever had a mammogram?

Have you ever had a mammogram?
A
B
C

Some women have been told about their breast density. Were you?

Some women have been told about their breast density. Were you?
A
B
BI-RADS D (extremely dense) breast tissue significantly increases breast cancer risk—about 4–6× compared to low density. BI-RADS C (heterogeneously dense) increases risk moderately (~1.5–2×). This is partly because dense breasts have more fibroglandular tissue, which may create a more hormone-responsive environment that supports tumor growth. Dense tissue also makes cancers harder to detect on mammograms, which is why additional imaging like ultrasound or MRI is often recommended.

Family History

Do you have a family history of breast or ovarian cancer?

Do you have a family history of breast or ovarian cancer?
A
B
C

Having a first-degree relative (like a mother or sister) with breast or ovarian cancer can double your risk; two or more affected relatives can raise it 3–4×. If a BRCA mutation is present, breast cancer risk may rise to 40–70%, and ovarian cancer risk up to 44%.

Genetic Testing

Have you had genetic testing for a mutation linked to cancer? (eg: 23&Me, Color, Invitae)

Have you had genetic testing for a mutation linked to cancer? (eg: 23&Me, Color, Invitae)
A
B

Medical History

Have you ever had any of the following?

Have you ever had any of the following?