Women who started menstruating (having periods) younger than age 12 have a higher risk of breast cancer later in life. The same is true for women who go through menopause when they're older than 55. Over the past 15 years, girls have been starting puberty at younger ages. Breast development has started even earlier than menstrual periods. Age at first period, estrogen and breast cancer risk. The increased risk of breast cancer linked to a younger age at first period is likely due, at least in part, to the amount of estrogen a woman is exposed to in her life. A higher lifetime exposure to estrogen is linked to an increase in breast cancer risk.
Feb 16, 2002 · It also showed that each full term pregnancy reduced the risk of breast cancer by 8%. 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.Cited by: 1. Some studies have found a link between early puberty in girls and a slightly increased risk of breast cancer later in life. However, the evidence is not clear. However, the evidence is not clear.
How does early menstruation increase my risk for breast cancer? ANSWER Longer lifetime exposure to endogenous (your own) estrogen increases your risk of breast cancer. This would include starting. Introduction: Women who go through menopause later in life have an increased risk of breast cancer compared to women who go through menopause earlier. A pooled analysis of data from 117 studies found for every year older a woman’s age at menopause, breast cancer risk increased by about 3 percent .. Learn more about age at menopause and breast cancer risk.