https://www.cancer.org/cancer/breast-cancer/treatment/treating-breast-cancer-during-pregnancy.html
重點在於這一段：
要點如下：
1.懷孕給乳癌診治帶來麻煩，大多數研究表明受孕與否與治療結果無關；
2.終止孕娠方便治療，但沒發現這樣做能改善治療結果和生存率。
3.因懷孕而延遲治療對最終治療效果無影響.
4. 沒有報告說乳癌本身對孩子有害。
How does pregnancy affect survival rates for breast cancer?
Pregnancy can make it harder to find, diagnose, and treat breast cancer. Most studies have found that the outcomes among pregnant and non-pregnant women with breast cancer are about the same for cancers found at the same stage, but not all studies agree.
Some doctors believe that ending the pregnancy may help slow the course of more advanced breast cancers, and they may recommend that for some women with advanced breast cancer. It’s hard to do research in this area, and good, unbiased studies don’t exist. Ending the pregnancy makes treatment simpler, but older studies that looked at pregnant women did not find that ending the pregnancy improves a woman’s overall survival or cancer outcome. Of note, there were some flaws that could have biased the outcomes of these studies. For example, the women who had more advanced disease were more likely to end their pregnancies. It’s hard to know if outcomes would be different with more modern treatments.
Studies have not shown that the treatment delays that are sometimes needed during pregnancy have an effect on breast cancer outcome, either. But this, too, has proven to be a difficult area to study. Finally, there are no reports showing that breast cancer itself can harm the baby.
