据欧美联合研究400例病例的结果，可以看到在妊娠期患乳腺癌的妇女，死于该病的危险比未怀孕者高3倍。妊娠的患者易于出现瘤体较大和腋淋巴结转移。即使控制这些因素后，其调整的相对死亡率也有2.8。甚至，患乳腺癌前的近3－4年内曾受孕者，死亡的危险系数也有上升，妊娠期后每 According to the results of a combined study of 400 cases in Europe and the United States, it can be seen that women who develop breast cancer during pregnancy are three times more likely to die from the disease than non-pregnant women. Patients with pregnancy are prone to large tumors and axillary lymph node metastases. Even after controlling these factors, the adjusted relative mortality rate was 2.8. Even in those who had suffered pregnancy before breast cancer, the risk factor for death also increased.