Protecting your fertility during treatment
- Medical Review: H. Irene Su, MD, MSCE
If you are premenopausal (still having menstrual periods), breast cancer treatments such as chemotherapy and hormonal therapy can affect your fertility. This may make it harder to become pregnant after treatment ends.
If you have just been diagnosed, it is important to discuss your fertility concerns with your healthcare team before starting breast cancer treatment. Your doctor may refer you to a fertility specialist, a doctor called a reproductive endocrinologist, who can help you learn more about the possible impact of treatment and ways to preserve your fertility. You may also find the Society for Assisted Reproductive Technology helpful.
Video: Fertility preservation after early-stage breast cancer
When Jasmine was diagnosed with early-stage breast cancer at 26, she needed to make unexpected decisions about preserving her fertility. Despite initial hesitation from her oncologist, Jasmine worked with her OBGYN and was referred to a fertility clinic where she was able to freeze embryos.
Here are some methods that can help you protect your fertility after breast cancer treatment. For more information, visit our section on fertility treatment options.
Freezing eggs and embryos
The best time to take eggs from your ovaries for future use is before treatment begins. For this process, fertility medicines are usually given for about 2 weeks to increase the number of eggs your body makes. Your doctor may give you tamoxifen, an aromatase inhibitor, or both during the egg-stimulating cycle, to lower possible exposure of your breasts to estrogen.
The eggs are removed during an outpatient surgery procedure. They may be frozen without being fertilized, or fertilized in a lab with sperm from your partner or a sperm donor. Then they are grown to form embryos. The eggs and embryos are frozen for use after breast cancer treatment. It is possible to have pre-implantation genetic testing to screen the embryos for chromosomal abnormalities or specific cancer risk gene mutations, if you have a known breast cancer gene mutation in your family. Your fertility specialist will have more information on these tests.
Egg or embryo freezing is the standard-of-care approach and most common method to preserve fertility. This process takes 2 to 6 weeks. Freezing your ovarian tissue or using medicines called GnRH agonists to suppress your ovaries are also possible, but both are considered experimental.
Fertility procedures often are coordinated with breast cancer treatment, usually during the weeks between surgery and chemotherapy. It can be stressful to make decisions about fertility right after a breast cancer diagnosis. You may want to get started with treatment quickly, or your doctors might recommend neoadjuvant therapy. Or maybe you haven’t thought about having future children, and cancer is now forcing you to do so.
Talk with your oncologist about timing—there may be ways to make a schedule work for you. Your oncologist can also communicate with the reproductive endocrinologist. This helps all your providers understand the timing for these procedures.
Ovarian suppression: LHRH agonists
Some studies have shown that medicines called gonadotropin releasing hormone agonists (GnRH agonists) or luteinizing hormone-releasing agonists (LHRH agonists) may protect the ovaries from the harsh effects of chemotherapy so they can recover more fully and quickly. These medicines shut down, or suppress, your ovaries. They cause menopausal symptoms for as long as you take them. Shutting down your ovaries reduces the amount of estrogen your body makes.
The LHRH agonists are:
- goserelin (Zoladex)
- leuprolide (Lupron)
- triptorelin (Trelstar)
Ask your doctors to be specific about what kind of ovarian suppression they recommend. Some doctors use “ovarian suppression” or “ovarian ablation” to mean the same thing. Ovarian ablation can also mean surgery to permanently remove your ovaries.
LHRH agonists are given as an injection once a month, every 3 months, or as an implant that lasts 3 months.
Side effects may include:
- bone thinning
- bone pain
- fatigue
- headache
- hot flashes
- insomnia
- joint and muscle aches
- loss of sexual interest
- mood changes
- sweating
- vaginal dryness
- weight gain
LHRH agonists are still under study. Note that this approach does not take the place of standard methods of preserving your fertility, such as freezing eggs and embryos. Not enough research has compared whether LHRH agonists during chemotherapy results in higher fertility after chemotherapy compared to placebo treatment.
Less toxic chemotherapy medicines
Some chemotherapy medicines may cause less damage to your reproductive organs, but be less effective at treating the cancer. Talk with your doctor about which chemotherapy treatments have a greater chance of protecting your fertility.
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- unresected
- upstaging
- urticaria
- VACB
- vaccine therapy
- vacuum-assisted biopsy or vacuum-assisted core biopsy
- Valium
- vancomycin
- vandetanib
- vascular endothelial growth factor-antisense oligonucleotide
- vascular endothelial growth factor receptor tyrosine kinase inhibitor
- vein
- Velban
- venipuncture
- venous sampling
- Versed
- vertebroplasty
- vinorelbine
- vital
- vomit
- watchful waiting
- wedge resection
- Wellcovorin
- Western medicine
- WGA study
- white blood cell
- whole cell vaccine
- whole genome association study
- wide local excision
- wire localization
- wound
- X-ray therapy
- Xanax
- Xeloda
- xerostomia
- Xgeva
- yoga
- ziconotide
- Zinecard
- Zofran
- zoledronic acid
- Zoloft
- Zometa
Living Beyond Breast Cancer is a national nonprofit organization that seeks to create a world that understands there is more than one way to have breast cancer. To fulfill its mission of providing trusted information and a community of support to those impacted by the disease, Living Beyond Breast Cancer offers on-demand emotional, practical, and evidence-based content. For over 30 years, the organization has remained committed to creating a culture of acceptance — where sharing the diversity of the lived experience of breast cancer fosters self-advocacy and hope. For more information, learn more about our programs and services.