Hormone replacement reduces the risk of heart disease in postmenopausal women, until a huge study finds that it doesn't (and that it raises the risk of breast cancer to boot).
Measurements of the subjects' heart rates, blood pressure, and stress hormone levels indicated that the stress was indeed getting to them.
对研究个人的心率，血压，和激素压力水平的测量显示他们确实收到了压力。
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And while estrogen was prescribed for decades for these problems, by the late 1990s studies were showing the hormone therapy might actually increase the risk of heart attacks.