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    To investigate the impact of heterogeneity in patient indications or insemination protocols on neonatal outcomes of singletons following early rescue ICSI (rICSI) treatments. A retrospective study was conducted. Propensity score matching and multivariable logistic regression were used to adjust for confounders and biases. A total of 9095 IVF patients, 2063 ICSI patients, and 642 early rICSI patients were included in the study. No differences were detected in neonatal outcomes except small for gestational age (SGA) which increased in early rICSI patients compared with both unmatched and matched IVF groups with the risk ratio (RR) of 1.31 (95% CI: 1.05, 1.64) and 1.49 (95% CI: 1.05, 2.12). Further analysis showed that SGA increased significantly in partial fertilization failure (PFF) cycles with RRs of 1.56 (95% CI: 1.08, 2.27) and 1.78 (95% CI: 1.22, 2.59) compared with both unmatched and matched IVF patients but not in TFF patients. A positive association between fertilization rate via IVF and birth weight z-score was revealed in the PFF patients. Early rICSI in patients with total fertilization failure (TFF) appeared to be safe in terms of neonatal outcomes. However, when expanding the indications of rICSI to PFF patients, the SGA in the offspring increased, suggesting a potential effect on long-term health. Since other treatment options, such as using only the IVF-origin embryos still exist for these patients, further studies were needed to confirm the optimal decision for these patients. © 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

    Citation

    Jie Geng, Jiali Cai, Ling Ouyang, Lanlan Liu, Zhenfang Liu, Caihui Ma, Xiaoming Jiang, Jianzhi Ren. Indications affect neonatal outcomes following early rescue ICSI: a retrospective study. Journal of assisted reproduction and genetics. 2024 Mar;41(3):661-672

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    PMID: 38386117

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