Abstract
Purpose
After chemotherapy for breast cancer, most women will recover some ovarian function, but the timing and extent of this recovery are poorly understood. We studied post-chemotherapy ovarian recovery in women with and without a history of ovarian suppression during chemotherapy.
Methods
Reproductive age breast cancer patients who were seen prior to chemotherapy for fertility preservation consult were consented for follow-up ovarian function assessment (every 3–6 months after chemotherapy) with antral follicle count (AFC) in this prospective cohort study. We restricted our analysis to those with menses present after chemotherapy. Box plots were used to demonstrate the change in follow-up AFC versus time elapsed after chemotherapy. A mixed effects regression model was used to assess differences in AFC.
Results
Eighty-eight patients with a history of newly diagnosed breast cancer were included. Forty-five patients (51%) had ovarian suppression with GnRH agonist (GnRHa) during chemotherapy. AFC recovery appeared to plateau at 1 year after completing chemotherapy at a median of 40% of pre-chemotherapy AFC. After adjustment for age, initial AFC, cyclophosphamide exposure, combined hormonal contraceptive (CHC) use, and tamoxifen use, AFC recovered faster and to a greater degree for those women who underwent GnRHa therapy for ovarian protection during chemotherapy (P = 0.032).
Conclusions
Women with menses after chemotherapy for breast cancer appear to recover their full potential AFC 1 year after their last chemotherapy dose. Treatment with GnRHa during chemotherapy is associated with a higher degree of AFC recovery. The findings of this study can aid in counseling patients prior to chemotherapy about expectations for ovarian recovery and planning post-treatment fertility preservation care to maximize reproductive potential when pre-treatment fertility preservation care is not possible or has limited oocyte yield.
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Acknowledgements
We would like to make a special thanks to our nurses, Elizabeth Gomes, Cathy Chin-Yu, and Audra Katz, who provided patient education at fertility preservation counseling appointments. We also thank the UCSF Department of OB/GYN for their support of this study.
Funding
This study was supported by departmental research funding within the University of California, San Francisco Department of Obstetrics, Gynecology and Reproductive Sciences and by the National Center for Advancing Translational Sciences, National Institutes of Health, through UCSF-CTSI Grant Number TL1 TR001871.
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N.S.’s and J.M.L.’s roles included study design, data collection, data analysis, and manuscript writing. K.W., P.X., B.L., and E.H.’s roles included data collection and manuscript writing. E.M.-L. and M.I.C.’s roles included data analysis and manuscript writing. M.R.’s roles included study design, data analysis, and manuscript writing.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the University of California, San Francisco (UCSF) Committee on Human Research and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.
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The authors declare that they have no conflict of interest.
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Sinha, N., Letourneau, J.M., Wald, K. et al. Antral follicle count recovery in women with menses after treatment with and without gonadotropin-releasing hormone agonist use during chemotherapy for breast cancer. J Assist Reprod Genet 35, 1861–1868 (2018). https://doi.org/10.1007/s10815-018-1203-8
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DOI: https://doi.org/10.1007/s10815-018-1203-8