大多数绝经前的女性在月经之后的21天里，体内的雌激素会产生一种健康幸福感。
For the first 21 days after menstruation, estrogen hormones create a feeling of well-being and give generally happy feelings.
而在绝经前的美国黑人妇女中未发现这一相关性。
This association was not observed among premenopausal African-American women.
男性和绝经后妇女每天只需8毫克，而绝经前的妇女每天则需18毫克。
Men and postmenopausal women need only around 8 mg a day, while premenopausal women need 18 mg a day.
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