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The effect of intrauterine human chorionic gonadotropin flushing on live birth rate after vitrified-warmed embryo transfer in programmed cycles: a randomized clinical trial

  • Gynecologic Endocrinology and Reproductive Medicine
  • Published:
Archives of Gynecology and Obstetrics Aims and scope Submit manuscript

Abstract

Purpose

To assess the influence of intrauterine human chorionic gonadotropin (hCG) before embryo transfer on the clinical pregnancy and live birth rates after vitrified-warmed embryo transfer (ET) in programmed cycles.

Methods

This study was a single-blind randomized clinical trial for eligible patients underwent frozen ET cycles with long-term hormonal GnRH agonist protocol for endometrial preparation. Immediately prior to ET, the women were randomly divided into three groups. In the experimental group, 7–10 min before embryo transfer, 500 IU of hCG with a 40 μL of culture medium was injected into the uterus. In the first control (sham) group, 7–10 min before ET just 40 μL of culture medium intrauterine was infused. In the second control group, no intervention was done. The pregnancy outcomes were compared in the three groups using appropriate statistical tests.

Results

Finally, 180 patients allocated into three groups. There was no significant difference in terms of patients ‘characteristics among three groups. No significant difference was found in terms of clinical pregnancy among three groups. The miscarriage rate in control group (0%) was significantly lower than those of in the sham and hCG groups (9.8% and P = 0.01, 6.6% and P = 0.04, respectively). In addition, live birth rate (39.3%) in control group was significantly higher than those of in the sham and hCG groups (16.4% and P = 0.005, 23% and P = 0.051, respectively).

Conclusion(s)

It was found that intrauterine injection of 500 IU hCG before vitrified-warmed ET at cleavage stage has no beneficial effect on pregnancy outcome and is not suggested. NCT02355925.

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Acknowledgements

We would like to thank all the participants and co-workers in Royan Institute for their assistance in this study.

Funding

No financial support has been granted.

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Authors and Affiliations

Authors

Contributions

MH: project conceptualization, methodology, administration, and manuscript writing/editing. TM: project conceptualization, methodology and supervision, and manuscript writing/editing. AA: data interpretation and manuscript writing/editing. ZZ: data analysis and manuscript editing. MS: data collection and follow-up and manuscript editing. FR: project administration, investigation, methodology, and manuscript editing.

Corresponding author

Correspondence to Fariba Ramezanali.

Ethics declarations

Conflict of interest

Author Maryam Hafezi declares that she has no conflict of interest. Author Tahereh Madani declares that she has no conflict of interest. Author Arezoo Arabipoor declares that she has no conflict of interest. Author Zahra Zolfaghari declares that she has no conflict of interest. Author Marya Sadeghi declares that she has no conflict of interest. Author Fariba Ramezanali declares that she has no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards ethical standards committee of Royan Institute and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Ethics approval code (EC/93/1069).

Informed consent

Informed written consent was obtained from all individual participants included in the study.

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Hafezi, M., Madani, T., Arabipoor, A. et al. The effect of intrauterine human chorionic gonadotropin flushing on live birth rate after vitrified-warmed embryo transfer in programmed cycles: a randomized clinical trial. Arch Gynecol Obstet 297, 1571–1576 (2018). https://doi.org/10.1007/s00404-018-4752-2

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  • DOI: https://doi.org/10.1007/s00404-018-4752-2

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