Chemotherapy and other medications
Chemotherapy involves using toxic substances to kill cancer in your body. It is not very safe for a pregnant woman as it can cause birth defects or lead to miscarriage. Your doctor will recommend the safest way to have chemo if necessary.
Conclusion
Cancer during pregnancy is rare, however, it does happen to some people. Some types of cancers are more likely to occur during pregnancy, such as breast cancer, ovarian cancer, and cervical cancer. Cancer usually does not affect the baby, although one may have to give birth earlier than usual.
Your doctor will discuss with you treatment options and how to manage your condition to keep the unborn baby safe, as some treatment options can affect the baby. It is possible to deliver a healthy baby to recover from cancer.
References
[1] https://www.mayoclinic.org/diseases-conditions/breast-cancer/symptoms-causes/syc-20352470
[2] https://www.mayoclinic.org/diseases-conditions/hodgkins-lymphoma/expert-answers/lymphoma/faq-20058546
[3] https://www.mayoclinic.org/diseases-conditions/leukemia/symptoms-causes/syc-20374373
[4] https://www.nhs.uk/conditions/melanoma-skin-cancer/
[5] https://www.cancer.org/cancer/colon-rectal-cancer/about/what-is-colorectal-cancer.html
[6] https://www.hopkinsmedicine.org/health/conditions-and-diseases/gestational-trophoblastic-disease
[7] https://www.mayoclinic.org/diseases-conditions/cervical-cancer/symptoms-causes/syc-20352501