Can women get pregnant after cancer treatment?

Often, yes. But it depends on which treatment, at what dose, and at what age. The National Cancer Institute lists eight things that decide it. Among them: the type of cancer, whether the tumor sits near the reproductive organs, and how fertile a woman was before any of this began.

What each treatment does

NCI goes treatment by treatment, and the differences are large.

Chemotherapy can harm ovarian follicles. Those are the sacs that hold egg cells. One drug family carries the highest risk: alkylating agents. They can stop the ovaries making mature eggs and estrogen. High doses, or several drugs at once, raise the risk more.

Radiation depends on where it is aimed. Beams to or near the cervix, tubes, ovaries, uterus, vagina, or vulva can harm ovaries or destroy eggs. Radiation near the uterus can cut blood flow or leave scarring. That may raise the risk of problems in a later pregnancy. Radiation to the brain can affect the glands that signal the ovaries. NCI adds a useful detail. Proton beam radiation and intensity-modulated radiation may affect fertility less than standard radiation.

Surgery is the most direct. A hysterectomy removes the uterus, so a pregnancy can no longer be carried. An oophorectomy removes one or both ovaries. Taking both causes infertility. Surgery for anal, bladder, colon, or rectal cancer can leave adhesions. Adhesions are scar-like bands between organs. They can block an egg's path from the tube to the uterus.

For immunotherapy and targeted therapy, NCI says the effects are still being studied. Some studies suggest that one class of targeted drug may lower fertility. They are called tyrosine kinase inhibitors.

Primary ovarian insufficiency is not always the end

This is the term to know. Primary ovarian insufficiency means the ovaries stop working properly.

NCI is careful not to make it absolute. Some women with this diagnosis still ovulate. They have irregular or occasional periods after treatment. In other cases the damage is permanent and early menopause follows.

The symptoms can be sharper than in natural menopause. NCI lists hot flashes and night sweats, irregular or absent periods, joint and muscle aches, mood swings, poor focus, sleep problems, vaginal dryness, and loss of libido.

It also carries long-term risks that have nothing to do with fertility. NCI names low bone density, osteoporosis, and more heart and blood vessel problems. Those are worth tracking whether or not a pregnancy is planned.

The decisions that come before treatment

Fertility preservation means saving eggs, embryos, or ovarian tissue for later use. NCI lists five ways. Embryo freezing, egg freezing, and ovarian tissue freezing. Lead shielding of the ovaries during radiation. And GnRHa drugs, which shut the ovaries down for a time.

Timing is the hard part. NCI says the care team advises on when a procedure fits. They also advise on the effect, if any, of delaying cancer treatment to do it. That talk belongs in the first week after diagnosis, not the last.

Two findings that changed the advice

NCI reports early results from the POSITIVE trial. Some women treated for breast cancer stopped hormone therapy to try to conceive. In the short term, that did not raise the risk of the cancer coming back.

NCI also reports that fertility preservation appears safe for young women with breast cancer. Experts say that supports offering it as part of standard care. Our guide to fertility preservation before treatment covers the options, and the piece on fertility in women after cancer treatment covers what comes next.

NCI's page was last updated on May 14, 2025.

Sources

• https://www.cancer.gov/about-cancer/treatment/side-effects/fertility-women