Tamoxifen可有效安全用於乳癌IVF病患病患  並不會下降IVF懷孕率

. 2014 Aug;102(2):488-495.e3.

 doi: 10.1016/j.fertnstert.2014.05.017. Epub 2014 Jun 14.

Tamoxifen co-administration during controlled ovarian hyperstimulation for in vitro fertilization in breast cancer patients increases the safety of fertility-preservation treatment strategies

Objective: To evaluate the safety and efficacy of tamoxifen co-administration during conventional controlled ovarian hyperstimulation (COH) protocols for a fertility-preservation IVF cycle in breast cancer patients.

Patient(s): Two groups of breast cancer patients: premenopausal patients treated with adjuvant tamoxifen; and patients undergoing in vitro fertilization (IVF) for fertility preservation.

Intervention(s): Fertility-preservation cycles, tamoxifen co-administration during conventional IVF.

Result(s): Estradiol (E2) levels were chronically high (mean 2663 pmol/L, maximum: 10,000 pmol/L) in 38 of 46 breast cancer patients treated with adjuvant tamoxifen. Co-administration of tamoxifen (48 cycles) during conventional IVF or without tamoxifen (26 cycles), using either the long gonadotropin-releasing hormone-agonist or-antagonist protocols, resulted, respectively, in a mean of 12.65 and 10.2 oocytes retrieved, and 8.5 and 6.4 embryos cryopreserved. Average peak E2 levels were 6,924 pmol/L and 5,093 pmol/L, respectively, but long-term recurrence risk (up to 10 years) was not increased.

Conclusion(s): In breast cancer patients, co-administration of tamoxifen during conventional COH for fertility preservation does not interfere with IVF results. The high serum E2 levels during COH should be considered safe, as it simulates the high prevalence of persistently high serum E2 levels in premenopausal breast cancer patients safely treated with adjuvant tamoxifen.