Oocyte cryopreservation for fertility preservation in women with cancer.
OBJECTIVE
It is necessary to clarify the fertility preservation-related points of concern that often frighten patients or physicians when it comes to deciding about oocyte cryopreservation for fertility preservation, which are often perceived as procedure limitations, are sometimes real and often theoretical and may make the prognosis worse.


RESULTS
Letrozole added to gonadotrophins for controlled ovarian stimulation is safe when applied to hormone-sensitive cancer patients as it avoids associated high estradiol levels. This benefit is only for estrogens, but not for progesterone. Triggering ovulation with gonadotropin releasing hormone agonist bolus and adding the gonadotropin releasing hormone antagonist after oocyte retrieval help minimize its effect. A random start is currently widespread as neither results nor offspring are compromised, and it avoids waiting for menstruation and, therefore, delaying treatment.


CONCLUSIONS
The cumulative live birth rate is conditioned by the number of available oocytes and patient's age. Assisted reproductive technologies may help cancer patients to achieve pregnancy with good obstetric outcomes and apparent oncological safety. Although counseling should be provided on an individual basis, fertility preservation in cancer patients and later pregnancy in survivors after adequate treatment and follow-up should not be discouraged.
aIVI Las Palmas, Las Palmas bIVI Madrid, Madrid cRey Juan Carlos University, Madrid, Spain.
Javier
J
Domingo
Juan A
JA
Garcia-Velasco
D015925:Cryopreservation / Q000379:methods; D004958:Estradiol; D005260:Female; D059247:Fertility Preservation / Q000379:methods*; D006801:Humans; D007247:Infertility, Female / Q000209:etiology; D000077289:Letrozole; D009369:Neoplasms / Q000150:complications*; D009570:Nitriles / Q000008:administration & dosage; D054315:Oocyte Retrieval; D009865:Oocytes; D010062:Ovulation Induction / Q000379:methods; D011247:Pregnancy; D018873:Pregnancy Rate; D027724:Reproductive Techniques, Assisted; D014230:Triazoles / Q000008:administration & dosage
D009570:Nitriles; D014230:Triazoles; D004958:Estradiol; D000077289:Letrozole