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1940s. Some key dates in research looking at estrogen and cancer:

Harm

Scientists first suggest synthetic estrogen might increase nsk for mammary tumors in rats.

1960s. Some key dates in research looking at estrogen and cancer:

Benefit

Estrogen use surges after bock promises women can slay "Feminine Forever".

1970s. Some key dates in research looking at estrogen and cancer:

Harm

Hew England Journal of Medicine reports on higher risfcof uterine cancer In estrogen users.

Hew England Journal of Medicine publishes study suggesting postmenopausal estrogen raises breast cancer risk.

1980s. Some key dates in research looking at estrogen and cancer:

Benefit

Doctors begin prescribing estrogen and progestin together to protect women from uterine cancer.

1990s. Some key dates in research looking at estrogen and cancer:

Harm

Nurses Health Study shews estrogen use raised breast cancer risk 32%, Estrogen and progestin increases risk by 41%.

2000s. Some key dates in research looking at estrogen and cancer:

Benefit

San Francisco researchers find that among women seeking mammograms, estrogemonfy users ш al 8% lower risk for breast cancer

Women's Health Initiative study finds estrogen by itself doesn't raise risk for breast cancer.

Harm

Woman's Health initiative confirms that estrogen and progestin use by postmenopausal women increases breast cancer risk.