Oncofertility Consortium

By Cathryn Smeyers

A recent article in the December issue American Journal of Obstetrics and Gynecology, entitled “Fertility preservation in women of reproductive age with cancer provides a comprehensive overview of the current options for fertility preservation in women with cancer. The authors identified six different options for fertility preservation, clearly outlining the benefits and drawbacks of each.

Embryo Banking

The most tried and true method of fertility preservation for women, embryo banking is like an in vitro fertilization cycle (IVF) cycle done for patients with infertility, except that the embryos are not immediately transferred into the patient.  Instead, after the oocytes are fertilized, the embryos are frozen and stored for the patient’s future use.

  • Advantages:
    • Established technique with predictable success rates
    • IVF protocol can be altered to fit patient needs
    • Disadvantages:
      • Requires the male gamete and time for ovarian stimulation
      • Potential for ethical issues with regard to handling of unused embryos

Oocyte Banking

Oocyte banking has come a long way in recent years. Like embryo banking, the patient undergoes ovarian stimulation to promote the growth of multiple oocytes.  Unlike embryo banking, these oocytes are not fertilized before being frozen.

  • Advantages:
    • Provides greater reproductive flexibility (no male gamete needed)
    • Success rates are improving
    • Disadvantages:
      • Requires time for ovarian stimulation
      • Track record not yet as strong as embryo banking

Ovarian tissue cryopreservation

Ovarian tissue cryopreservation involves the banking of ovarian tissue that can later be transplanted back into the patient to restore or improve her fertility.

  • Advantages:
    • Avoids ovarian stimulation
    • Option for pre-pubertal girls
    • Possibility of pregnancy without future ART
    • Disadvantages:
      • Experimental procedure with unproven success rates
      • Risk of reintroducing cancer in patient’s body

In vitro maturation of oocytes

In vitro maturation of oocytes involves removing immature oocytes from ovarian tissue, maturing them in vitro, and then using ART.

  • Advantages:
    • Provides greater reproductive flexibility
    • Avoids ovarian stimulation
    • Disadvantages:
      • Results in fewer viable oocytes in comparison to embryo/oocyte banking, but procedure requires a similar amount of time

Gonadal suppression with GnRH agonists
Gonadal suppression with GnRH agonists involves protecting the ovaries from the affects of cancer therapy by using hormones to suppress ovarian function at the time of treatment.

  • Advantages:
    • No surgery required
    • Preserves hormonal function and fertility
    • Disadvantages:
      • Uncertain efficacy
      • Mixed results from trials

Ovarian transposition

Ovarian transposition is a technique in which the ovaries are protected from radiation by being surgically moved from the pelvis to another area of the body.

  • Advantages:
    • Decreases the risk of ovarian failure from irradiation
    • Disadvantages
      • Useful only to patients who must undergo pelvic radiation
      • Surgical procedure required
      • Patient may require IVF/ART if fallopian tube is cut during procedure

To learn more about fertility preservation options before, during, and after cancer treatment, including which chemotherapy regimes are most likely to affect fertility, please visit SaveMyFertility.org.

 

Comments

Ugo Sybaris - C...

For many couples happiness is distroyed because infertility. I'm glad you are treating this dissease to giving back hope to those couples!

Ronald

Good article. This is really interesting for me..

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