研究小组发现雌激素和化学药品能引起乳腺球数量增加和体积增大。
The team found that estrogen and the chemicals caused the mammospheres to increase in numbers and size.
在1980和1990年代，乳腺癌发病率稳定地上升，与此同时，肥胖率和激素替代疗法的应用也在增加，激素替代疗法中有涉及到雌激素。
In the 1980s and 1990s, breast cancer rates steadily increased, in parallel with the rise in obesity and the use of hormone replacement therapy, which involves estrogen.
激素变化女性——如果你正在接受激素替代治疗(HRT)，你可能首先己经知道的是，过量的雌激素会导致脂肪量增加，而不是肌肉。
Hormonal changes. Women — if you're on hormone replacement therapy (HRT), you've probably learned firsthand that extra estrogen can cause a weight gain in fat, not muscle.
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