Abstract
Purpose
To verify whether a novel protocol administering E2 during the luteal phase of the preceding cycle and during ovarian stimulation in GnRH antagonist cycle could enhance follicular response and hence improve outcomes in poor responders.
Methods
In this retrospective analysis, a total of 155 poor responder patients subjected to IVF/ICSI were analyzed. All the patients had history of more than one prior IVF cycle failure with poor response (less than 5 oocytes retrieved and/or maximal E2 level less than 500 pg/mL) by using conventional long agonist or antagonist protocol. In luteal E2 treatment protocol (n = 86), oral estradiol valerate 4 mg/day was initiated on luteal day 21 and either stopped at menstrual cycle day 3 (Protocol A, n = 28) or continued during the period of ovarian stimulation until the day of hCG injection (Protocol B, n = 58). IVF parameters and pregnancy outcome of luteal E2 treatments group were compared with a standard GnRH antagonist protocol (n = 69) which the patients received no hormonal pretreatment.
Results
Compared to standard GnRH antagonist protocol, cancellation rate was lower with luteal E2 group (15.1% vs 37.7%, p < 0.01). Moreover, patients treated with luteal estrogen resulted in an increased number of oocytes retrieved (4.5 ± 2.9 vs 3.2 ± 1.9; p < 0.01). A trend toward increase in number of normally fertilized embryos (2.9 ± 2.1vs 2.3 ± 1.9; p = 0.043), and increased prevalence of good quality embryos (51.2% vs 25%; p = 0.047) were noted. Comparing protocol A and B, there were no significant difference between embryologic data, however there were slight increase in ongoing pregnancy rate in protocol B compared to A (27.1% vs 20%, p = 0.357), although statistical significance was not achieved.
Conclusion
Estrogen priming through luteal phase and stimulation phase improved ovarian responsiveness and this may lead to an increase in pregnancy rate in poor responders with failed cycle.
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Acknowledgements
This study was supported by a grant (no. A084923) from the Korea Healthcare Technology R&D Project, Ministry for Health, Welfare and Family Affairs, Republic of Korea.
These findings are presented at the 27th Annual Meeting of the European Society of Human Reproduction and Embryology, Stockholm, Sweden on 3–6 July, 2011.
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Capsule Estrogen priming through luteal phase and stimulation phase improved ovarian responsiveness and this may lead to an increase in pregnancy rate in poor responders.
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Chang, E.M., Han, J.E., Won, H.J. et al. Effect of estrogen priming through luteal phase and stimulation phase in poor responders in in-vitro fertilization. J Assist Reprod Genet 29, 225–230 (2012). https://doi.org/10.1007/s10815-011-9685-7
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DOI: https://doi.org/10.1007/s10815-011-9685-7