Can you be pregnant with cancer, but have your baby free of cancer?

Absolutely: It is pretty rare to transmit cancer from mother to baby during pregnancy. Talk to your doctor.

Almost always: Cancer only very rarely affects the fetus of a mother with cancer.

Yes: Most maternal cancers affect a specific part of the body outside the uterus. The baby develops within a series of protective membranes that keep out invasive things. The only connection to mom is the layer of uterine wall where the placenta is attached.