The Women's Health Initiative study was halted prematurely in 2002 because of a 24 percent higher risk of breast cancer associated with the combination therapy of estrogen and progestin.
女性健康机构于2002年提前终止了激素替代疗法，以为他们发现联合使用雌激素和孕激素疗法后，乳腺癌发病率增加了24%。
A synthetic estrogen, C21H26O2, used in combination with a progestin in oral contraceptive preparations.
炔雌醇甲醚一种合成的雌激素，化学式为c21h26o2，与。
A synthetic estrogen, C21H26O2, used in combination with a progestin in oral contraceptive preparations.
炔雌醇甲醚一种合成的雌激素，化学式为c21h26o2，与。
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