Abstract
Purpose
To determine whether granulocyte–macrophage colony-stimulating factor (GM-CSF)-containing medium could improve embryo-transfer outcomes in frozen-thawed blastocyst transfer.
Methods
Patients who underwent frozen-thawed blastocyst transfer (430 women, aged 30–39 years, 566 cycles) were analyzed. Frozen-thawed blastocysts were cultured in GM-CSF-containing medium or control medium for 3–5 h, followed by transfer to the uterus. The embryo-transfer outcomes in the two groups were measured and compared, and a propensity score matching (1:1) method was used to balance the differences in baseline characteristics. We analyzed 213 matched samples.
Results
In patients who underwent frozen-thawed blastocyst transfer with GM-CSF, the percentage of human chorionic gonadotropin-positive cases, biochemical pregnancies, clinical pregnancies, ongoing pregnancies, and live birth rates was 60.6%, 7.98%, 52.6%, 42.9%, and 40.9%, respectively, as compared with 45.1%, 3.29%, 41.8%, 31.1%, and 30.5%, respectively, for the control groups. The rates of human chorionic gonadotropin positivity (odds ratio [OR]: 1.87, 95% confidence interval: [CI]: 1.27–2.75), biochemical pregnancy (2.55, 1.04–6.29), clinical pregnancy (1.54, 1.05–2.27), ongoing pregnancy (1.64, 1.13–2.41), and live birth (1.67, 1.14–2.45) were significantly higher in the GM-CSF group than the control group. The incidence of pregnancy loss (22.3% vs. 27.0%) did not significantly differ between the groups.
Conclusion
The use of a GM-CSF-containing medium for blastocyst-recovery culture improved the live birth rate as a result of increased implantation rate in the frozen-thawed blastocyst-transfer cycle. The use of GM-CSF-containing medium following blastocyst thawing could be an effective choice for improving the blastocyst-transfer outcomes.
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Data availability
The datasets analyzed in this study are not published in order to protect personal information but are available from the corresponding author upon reasonable request.
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Acknowledgements
We thank the staff of Takahashi Women’s Clinic. We also thank Editage (http://www.editage.com) for editing and reviewing this manuscript for language.
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All authors contributed to the study conception and design. Data collection and analysis were performed by MO-K, TK, TS, MF, and KT. In vitro experiments were performed by MO-K and MS. The first draft of the manuscript was written by TK and MO-K. All authors commented on previous versions of the manuscript and read and approved the final manuscript.
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This study was approved by the institutional review board of Takahashi Women’s Clinic (protocol number: TWC20-001). The in vitro experimental study was approved by the institutional review board of Takahashi Women’s Clinic (protocol number: TWC20-002) and registered at the Japan Society of Obstetrics and Gynecology.
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Consent for this study was obtained in the form of opt-out through our clinic website and a bulletin board. For the in vitro experiments, written consent was obtained from all patients, and the discarded, cryopreserved blastocysts were used for the outgrowth assay.
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The authors declare no competing interests.
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Okabe-Kinoshita, M., Kobayashi, T., Shioya, M. et al. Granulocyte–macrophage colony-stimulating factor-containing medium treatment after thawing improves blastocyst-transfer outcomes in the frozen- thawed blastocyst-transfer cycle. J Assist Reprod Genet 39, 1373–1381 (2022). https://doi.org/10.1007/s10815-022-02493-1
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DOI: https://doi.org/10.1007/s10815-022-02493-1