Abstract
The double-ovarian stimulation strategy has been proposed to optimize the number of oocytes retrieved within the shortest possible timeframe. The objective of this study is to explore the effectiveness of luteal phase (LP) ovarian stimulation as compared to the previous follicular phase (FP) stimulation in a double stimulation strategy. We conducted an observational cohort study of women scheduled for a double stimulation protocol between March 2014 and June 2017, who had completed the FP controlled ovarian stimulation (COS 1) and started the LP stimulation (COS 2) in the same cycle. Women received equivalent daily doses of gonadotropins in combination with GnRH-antagonist protocol for both the COS 1 and the COS 2 performed during the same cycle. Ovulation was triggered using GnRH-agonist in the two stimulations. The primary outcome was the number of oocytes retrieved. A total of 77 patients were included in the analysis. The number of oocytes retrieved after COS 1 was significantly higher than after the COS 2 (5.25 ± 3.38 for COS 1 versus 3.83 ± 3.14 for COS 2; p = 0.001). The duration of the stimulation was significantly shorter, the total dose of injected gonadotropins was significantly lower, and the estradiol level on the trigger day was significantly higher with COS 1 as compared to COS 2. Stimulation during the LP in a double-successive stimulation strategy results in a lower ovarian response as compared to the FP equivalent daily dose stimulation.
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Acknowledgments
The authors wish to thank staff members of our department’s operating room for their expert assistance with data collection. The authors also gratefully acknowledge Valerie Blanchet, Julia Gonnot, and Celie Cervantes for unabatedly managing the patient database.
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M.B., P.S. and Y.C. were involved in substantial contributions to conception and design, acquisition of data, drafting and revising the article, and final approval of the version to be published; P.S. and C.C. were involved in substantial contributions to conception and study design, revising the article critically for important intellectual content and final approval of the version to be published; C.M., K.PC., and L.M. were involved in contributions to acquisition of data and final approval of the version to be published.
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ESM 1
S1 Table Baseline characteristics of the per protocol (PP) population. IVF in vitro fertilization, BMI body mass index, FSH follicle-stimulating hormone, LH luteinizing hormone, AMH anti-Mϋllerian hormone, AFC antral follicle count – Data are the mean ± standard deviation or n (%), unless specified otherwise; NA not applicable (DOCX 59 kb)
ESM 2
S2 Table Follicular (COS 1) and luteal phase (COS 2) ovarian stimulation characteristics in the subgroup of infertile women. ITT (intention to treat) population, all of the women who had received the COS 1 and started the COS 2 in the subgroup of infertile women (n = 53 women); PP (per protocol) population, all of the women who completed both the COS 1 and 2 in the subgroup of infertile women (n = 47 women); MII, metaphase II oocytes; a at triggering day; Data are the mean ± standard deviation or n (%); p paired Student’s t-test t Student’s t-test (DOCX 51 kb)
ESM 3
S3 Table Follicular (COS 1) and luteal phase (COS 2) ovarian stimulation characteristics in the subgroup of fertility preservation women. ITT (intention to treat) population, all of the women who had received the COS 1 and started the COS 2 in the subgroup of fertility preservation women (n = 24 women); PP (per protocol) population: all of the women who completed both the COS 1 and 2 in the subgroup of fertility preservation women (n = 23 women); MII, metaphase II oocytes; a at triggering day; Data are the mean ± standard deviation or n (%); p paired Student’s t-test t Student’s t-test (DOCX 54 kb)
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Bourdon, M., Santulli, P., Maignien, C. et al. The Ovarian Response After Follicular Versus Luteal Phase Stimulation with a Double Stimulation Strategy. Reprod. Sci. 27, 204–210 (2020). https://doi.org/10.1007/s43032-019-00012-9
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DOI: https://doi.org/10.1007/s43032-019-00012-9