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The protective effect of tamoxifen in women with ER-positive breast cancer who opt for cryopreservation of oocytes or embryos: a prospectively controlled study.

The objective of this study is to investigate the relation between tamoxifen use during COS, endoxifen levels reached during COS, and recurrence-free survival (locoregional recurrence, distant recurrence or death from any cause) when compared with…

Stimulation of the ovaries in women with breast cancer undergoing fertility preservation: alternative versus standard stimulation protocols; the STIM-trial

To evaluate the effects of COS with tamoxifen or letrozole compared to standard COS, on oocytes retrieved.