But if oestrogen has been clearly associated with cancer growth, the role of progesterone in breast cancer (and consequently the importance and the specific mechanism of progesterone-blocking therapy) is much less clear.
But if oestrogen has been clearly associated with cancer growth, the role of progesterone in breast cancer (and consequently the importance and the specific mechanism of progesterone-blocking therapy) is much less clear.
但是，如果雌二醇已经参与肿瘤的生长，孕酮在乳癌中的作用（孕酮阻断疗法的重要性和具体机制）就不很清楚了。