有关口服避孕药对乳腺癌发生和预后的影响目前仍无定论。至今流行病学的研究也还没有提出口服避孕药与乳腺癌有因果关系的证据。鉴于年轻妇女较普遍地使用口服避孕药,同时观察到年轻妇女乳腺癌似有增高之趋势,为了评价口服避孕药对乳腺癌演变的可能作用,作者进行了本项研究。154例35岁以下的乳腺癌患者分为两组,59例口服避孕 The impact of oral contraceptives on the occurrence and prognosis of breast cancer is still inconclusive. To date epidemiological studies have not yet provided any evidence of a causal relationship between oral contraceptives and breast cancer. In view of the more common use of oral contraceptives by young women and the observed increase in breast cancer in young women, the authors conducted this study in order to assess the possible role of oral contraceptives in the evolution of breast cancer. 154 patients with breast cancer under 35 years old were divided into two groups, 59 cases of oral contraception