Parenthood after cancer: When can survivors safely try to conceive?

Cancer survivors who desire parenthood face unique questions about the timing of conception after treatment. While no fixed waiting period exists, various factors influence the decision. The post-treatment timeline depends on the cancer type, specific therapies received, the patient's age, general health status, and risk of cancer returning.

Dr Hrishikesh Pai, a gynaecologist and IVF specialist from Lilavati Hospital, Mumbai, and Fortis Hospitals in Delhi and Chandigarh, clarifies, “There's no one-size-fits-all waiting period. Some patients might be advised a couple of months, whereas others may need to wait for years, especially if they're undergoing ongoing hormone or other cancer treatments.”

The article emphasizes that consulting a healthcare provider before attempting pregnancy is crucial. The timing should ideally be decided in collaboration with both the oncologist and a fertility specialist. Dr Pai stresses, “Never discontinue or alter cancer medications without consulting a physician.” Each patient’s needs are different, and a personalized plan can help balance the desire to conceive with the goals of cancer recovery and the safety of a future pregnancy.

Cancer treatments like chemotherapy and radiation can impact fertility in several ways. Chemotherapy may reduce the number of eggs in women or affect sperm quality and production in men. Radiation therapy near reproductive organs can also harm their function. Some surgeries and hormonal changes due to treatment can lead to irregular periods, lower ovarian reserve, or premature menopause in women.

For men, sperm count and quality might decline temporarily or permanently. However, the effects vary based on the treatment type, intensity, and the organs involved.

Despite these potential challenges, a prior cancer diagnosis doesn't automatically preclude conception or having a healthy pregnancy. Dr Pai advises, “Before trying to conceive, all patients should undergo a thorough evaluation.” Women may require hormone testing and assessments of ovarian reserve, including anti-Müllerian hormone (AMH) testing and an ultrasound to count antral follicles.

Men might need a semen analysis. Depending on the treatment history, additional cardiac, hormonal, or other investigations could be recommended. These evaluations help the cancer treatment and fertility teams decide whether pregnancy can be safely planned and when it might be appropriate.

For those seeking to preserve their fertility before cancer treatment begins, several options exist. Egg freezing involves collecting and freezing unfertilised eggs for future use. Embryo freezing follows fertilisation with sperm through IVF, allowing the creation of embryos that can be stored. Ovarian tissue freezing is another option, where tissue is removed and preserved for potential future use.

Sperm freezing is straightforward for men, either by ejaculation or specialized retrieval methods if no sperm is available. Other methods include medication to suppress ovarian function during chemotherapy, though this is not a substitute for established fertility preservation techniques. For boys who haven't reached puberty, testicular tissue freezing is experimental and available only in specialized centers.

Even after completing cancer treatment, survivors can consult fertility specialists to explore options like IVF using previously frozen eggs, sperm, or embryos, where feasible and appropriate. Dr Pai highlights the importance of early counselling and coordination between oncology and fertility specialists. Planning ahead helps patients understand their reproductive options while ensuring that cancer treatment and recovery remain the primary focus.