Ovarian Hyperstimulation Syndrome Clinical Trial
Official title:
Prevalence of Ovarian Hyperstimulation Syndrome in Patients Triggered by GnRH Agonist for Excessive Follicular Response After Ovarian Stimulation With a GnRH Antagonist
In the literature, the risk of moderate to severe OHSS is 3 to 6% and reaches 31% in high
risk populations 9 days after oocyte triggering with hCG. Many studies report no or a
markedly decreased risk of OHSS after triggering ovulation with a GnRH agonist. However,
criteria to define OHSS are rarely explained and OHSS itself is not thoroughly asserted. It
is well known that OHSS is associated with hypercoagulability. However, no study after
triggering with a GnRH agonist assessed haemostasis in these high-risk patients with high
circulating estradiol levels.
Study design, size, duration: In a French academic reproductive medicine centre, a systematic
prospective observational follow-up of all patients triggered by GnRH agonist for excessive
follicular response will be conducted. Participants/materials, setting, methods: All patients
undergoing antagonist protocol and at high risk of OHSS (estradiol level ≥ 3000 pg/mL and/or
more than 20 follicles ≥ 11mm on the day of triggering) will be triggered by GnRH agonist. No
luteal phase support and a "freeze-all" strategy will be performed. On the day of oocyte
retrieval (T0), at 48h (T1) and at day 7 (T2), OHSS and hypercoagulability will be
systematically assessed. Haemostasis data will be compared to the initial status of each
patient.
Seventy-five patients will be required for this study. ;
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