ArticleJBRA assisted reproduction2023
Low responders may benefit from undergoing ovarian stimulation with a long GnRH agonist protocol with corifollitropin alfa followed by hMG.
Article in JBRA assisted reproduction, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
3 citing papers in PubMed.
- Influence of corifollitropin alfa on embryo morphokinetics and fertility treatment outcome.Frontiers in reproductive health · 2026Article
- The Effectiveness of the GnRH Agonist/Antagonist Protocols for Different Poseidon Subgroups of Poor Ovarian Responders.Journal of clinical medicine · 2025Article
- Comparative efficacy of r-hFSH Alfa + r-LH versus r-hFSH delta + hMG in poor ovarian responders.Frontiers in endocrinology · 2025Article
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5 authors.
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Abstract
objectiveTo evaluate the outcomes of a long GnRH agonist protocol with corifollitropin alfa followed by hMG in low responders.
methodsRetrospective cohort study. Patients with a suboptimal previous ovarian response (<9 oocytes) and a normal ovarian reserve (Poseidon groups 1 and 2) were classified in 1) Group 1 (n=88), submitted to a second cycle with a GnRH antagonist protocol using rFSH/hMG; 2) Group 2 (n=66), submitted to a long GnRH agonist protocol with corifollitropin alfa followed by hMG (named as simplified long protocol). Clinical outcomes were compared between groups and between the first/second cycle of each group.
resultsClinical outcomes were similar between groups. There were no differences in the number of oocytes [7(5-11.75) versus 7(5-10), p=0.802], clinical pregnancy (19.3% versus 18.2%, p=0.858) and live birth rates (18.2% versus 15.2%, p=0.619). However, baseline characteristics were different, decoding a poor prognosis among women in group 2. Both groups (1 and 2) had significantly higher number of oocytes, pregnancy, and live birth rates in the second cycle. In group 2, there was a higher rate of embryo transfer (56.1% versus 27.3%, p<0.001). In group 1, despite the similar rate of embryo transfer, there was a higher positive hCG (23.9% versus 8.0%, p=0.004).
conclusionsBoth simplified long protocol and GnRH antagonist protocol are suitable for low responders. The best second cycle clinical outcomes experienced in a population with worse prognosis (group 2) suggests that the simplified long protocol may be a better option, although prospective well-conducted studies must explore this hypothesis.
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