Lybrel-Birth-Control.com

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Summary: hormone. Women, of course, need estradiol to lead healthy lives and bear children. Men need it, too: for example, men must convert testosterone to estradiol in order to build bone tissue. On the down side, some cancers, such as some types of breast cancer, are fueled by estradiol; they're said to be estrogen-responsive. And the estrogens in birth control pills or hormone

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