Does age of first period affect breast cancer risk?

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Does early menstruation increase breast cancer risk?

Early onset of periods also increased a woman’s risk of developing breast cancer. Women who had started their periods at 15 were at only two thirds the risk of premenopausal breast cancer compared with women whose periods had started at 11. The risk decreased by 7% for every year that periods were delayed.

Does your period affect breast cancer?

A large meta-analysis demonstrated that the period of time between onset and cessation of menstrual cycling strongly correlates with increased breast cancer risk in women (5). For each year younger a girl commences menstrual cycling, there is a 5% increase in lifetime risk of breast cancer.

Is menarche after age 12 a risk factor for breast cancer?

These findings confirm that young age at menarche and old age at menopause increase breast cancer risk. Many factors known to affect breast cancer risk, including childbearing patterns, height, and BMI, are also associated both with women’s age at menarche and with their age at menopause.

Does early puberty cause breast cancer?

Hormone Exposure, Early Puberty May Increase Breast Cancer Risk for Adolescent Girls. Long-term study results show which mechanisms of early-onset puberty in adolescent girls may predispose them to a greater risk of developing breast cancer.

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What is the earliest age a girl can get her period?

Most girls start their periods when they’re about 12, but they can start as early as 8, so it’s important to talk to girls from an early age to make sure they’re prepared. Respond to questions or opportunities as they arise and do not be embarrassed.

How do you age at menarche affect breast cancer risk?

Answer. Earlier age at menarche has been consistently associated with increased risk of both premenopausal and postmenopausal breast cancer. Early menarche may be associated with more rapid onset of regular ovulatory menstrual cycles and hence greater lifetime exposure to endogenous hormones.

How does a woman’s weight influence her breast cancer risk?

For women, being overweight or obese after menopause increases the risk of breast cancer. Having more fat tissue can increase your chance of getting breast cancer by raising estrogen levels. Also, women who are overweight tend to have higher levels of insulin, another hormone.

What percentage of breast cancer is genetic?

About 5% to 10% of breast cancer cases are thought to be hereditary, meaning that they result directly from gene changes (mutations) passed on from a parent. BRCA1 and BRCA2: The most common cause of hereditary breast cancer is an inherited mutation in the BRCA1 or BRCA2 gene.

Does wine cause breast cancer?

Research consistently shows that drinking alcoholic beverages — beer, wine, and liquor — increases a woman’s risk of hormone-receptor-positive breast cancer. Alcohol can increase levels of estrogen and other hormones associated with hormone-receptor-positive breast cancer.

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