Breast cancer is currently the highest number of new malignant tumors in the world, surpassing lung cancer as the “number one cancer”. Due to the young age of breast cancer patients and the modern trend of late marriage and childbirth, the proportion of women of childbearing age among breast cancer patients is increasing year by year. More and more young breast cancer patients, their quality of life, especially the issue of fertility protection, such as “pregnancy and childbirth”, is becoming a major problem for them. Can young patients still get pregnant and have their own children after breast cancer? It is possible to get pregnant and have a child, but there are some considerations that must be taken into account. First, a brief explanation of the impact of tumor treatment on fertility. Some studies have shown that the tumor treatments that patients have experienced in the past can have varying degrees of harm to their fertility. For example, chemotherapy produces toxicity to ovarian cells, leading to decreased ovarian function, ovarian failure, and premature menopause. The effect of radiation scattered during radiotherapy on ovarian cells. The great psychological barrier and psychological burden brought by tumor disease to patients, which leads to difficulties in pregnancy and childbirth, etc. Fertility protection for women before or during breast cancer treatment is currently advocated clinically. The currently accepted fertility protection measures are: cryopreservation of oocytes or embryos before treatment, cryopreservation of ovarian tissue before treatment, and use of gonadotropin-releasing hormone agonists during chemotherapy. Some studies have shown that fertility protection measures, with or without hormonal stimulation, do not increase the risk of breast cancer recurrence. However, the timing of pregnancy, which varies between patients, is a consideration that must be taken into account, as described in the article “When is the best time to get pregnant after breast cancer treatment? .