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Evaluation of two gonadotropin-releasing hormone (GnRH) analogues (leuprolide and buserelin) in short and long protocols for assisted reproduction techniques

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Abstract

Purpose

The administration of two GnRH analogues (buserelin and leuprolide acetate) in long and short protocols was evaluated prospectively. In the long protocol, the analogues were given from day 1 of the cycle for at least 14 days and then hMG administration was started, while in the short protocol the analogues were initiated from cycle day 1, adding hMG from day 3. The patients were divided into four groups according to the protocol used: Group I, buserelin-long; Group II, buserelin-short; Group III, leuprolide-long; and Group IV, leuprolide-short. Serum E 2 levels on the day of hCG injection and the number of follicles observed, oocytes retrieved, and embryos obtained, as well as implantation rates, were significantly higher (P<0.001) in the long protocols than in the short ones.

Results

Pregnancy rates were similar in all groups, although a trend for better results was observed in buserelin-long compared to buserelin-short. There were no differences in the results achieved with buserelin or leuprolide.

Conclusion

The administration of GnRH analogues (buserelin and leuprolide acetate) in long protocols induced a more intense ovarian response and was associated with significantly higher implantation rates and also a trend for higher pregnancy rates, although this difference was not statistically significant.

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Authors and Affiliations

  1. Second Department of OB/GYN, Aristotelian University of Thessaloniki, Thessaloniki, Greece

    J. Bontis & G. Pados

  2. IVF Centre “Geniki Kliniki,”, Thessaloniki, Greece

    B. C. Tarlatzis, F. Pournaropoulos, J. Bontis, S. Lagos, G. Pados & S. Mantalenakis

  3. Department of Obstetrics-Gynecology, Aristotelian University of Thessaloniki, “Hippokration” General Hospital, 50 Papanastasiou Str., 54639, Thessaloniki, Greece

    B. C. Tarlatzis, G. Grimbizis & S. Mantalenakis

Authors
  1. B. C. Tarlatzis
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  2. G. Grimbizis
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  3. F. Pournaropoulos
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  4. J. Bontis
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  5. S. Lagos
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  6. G. Pados
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  7. S. Mantalenakis
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Tarlatzis, B.C., Grimbizis, G., Pournaropoulos, F. et al. Evaluation of two gonadotropin-releasing hormone (GnRH) analogues (leuprolide and buserelin) in short and long protocols for assisted reproduction techniques. J Assist Reprod Genet 11, 85–91 (1994). https://doi.org/10.1007/BF02215993

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  • DOI: https://doi.org/10.1007/BF02215993

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