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    Efficacy-oriented approach for medium-sized follicles: A perspective on stimulation, expectation, and triggering strategy in IVF cycles
    (Wiley, 2026) Aydın, Gerçek; Ergin, Elif; Araç, Merve; Bülbül, Mehmet; Çalışkan, Eray; Hatırnaz, Şafak; Dahan, Michael; Malvasi, Antonio; Tinelli, Andrea
    Objective: To assess the therapeutic significance of routinely aspirating mid-sized fol licles (14.0–16.9 mm) during oocyte pick-up (OPU) by looking at procedural efficiency and embryo usage in cycles with varied follicular cohorts. Methods: In vitro fertilization (IVF) cycles with follicles classified as large (≥17 mm) or mid-sized (14.0–16.9 mm) at the time of OPU were included in this prospective cohort. Each group's oocytes were extracted and treated independently while main taining rigorous traceability. Analysis was performed on embryologic results, opera tive time factors, and embryo transfer utilization across successive transfer attempts. Pregnancy outcomes and the length of the operation were investigated. Laboratory results pertaining to trigger strategies were assessed descriptively. Results: When measured per mature oocyte, oocytes from mid-sized follicles showed comparable fertilization and blastocyst development rates. However, only a small percentage of embryo transfers included embryos from mid-sized follicles, especially in the initial two transfer attempts. Large follicles had a longer total OPU duration, and cycles that resulted in miscarriage had significantly longer operative times among large-follicle-derived embryo transfers. For mid-sized follicles, there were no differ ences in the length of the procedure based on the pregnancy outcome. Conclusion: The contribution of mid-sized follicle-derived oocytes to embryo trans fer selection seems to be restricted in everyday practice, despite their reassuring laboratory competence. Procedural efficiency is a potentially significant factor in customized IVF care, as evidenced by the correlation between longer operating times and worse clinical outcomes. In certain clinical situations, a focused stimula tion and aspiration approach might be suitable without obviously jeopardizing cu mulative results.