Hereditary breast cancer commonly occurs in premenopausal women.

遗传性乳癌通常发生于绝经前妇女。

youdao

This association was not observed among premenopausal African-American women.

而在绝经前的美国黑人妇女中未发现这一相关性。

youdao

Answer: False. Because iron accumulates in the blood, men need less than premenopausal women.

因为铁元素集中在血液中，男性的需求量要小于绝经期前的女性。

youdao

For example, obesity actually appears to be protective for premenopausal breast cancer, whereas it is a risk factor for postmenopausal breast cancer.

FORBES: After 40 Years Of Research, What Do We Know About Preventing Breast Cancer?

But in the premenopausal years, a woman's sex hormones start to change.

CNN: Why you really should get 'Fit By 40'

Weight gain of 25 to 35 pounds is normal in pregnancy and not associated with an increase in risk for either premenopausal or postmenopausal breast cancer, the study found.

BBC: Breast cancer risk for large mums