Accumulation of embryos to improve outcomes in advanced-age women undergoing IVF/ICSI cycles: a retrospective cohort study - Report - MDSpire

Accumulation of embryos to improve outcomes in advanced-age women undergoing IVF/ICSI cycles: a retrospective cohort study

  • By

  • Mingya Cao

  • Yue Wang

  • Liang Zhou

  • Kexin Xing

  • Huanjun Li

  • Yuanyuan Liu

  • Qingyun Sun

  • Xuli Zhu

  • Zhiming Zhao

  • July 7, 2026

  • 0 min

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Clinical Report: Enhancing IVF/ICSI Success Rates in Older Women Through Embryo Accumulation

Overview

This study investigates the impact of an embryo accumulation strategy on reproductive outcomes in advanced-age women undergoing IVF/ICSI.

Background

As women age, particularly after 35, their reproductive potential declines, leading to lower natural conception rates and challenges in achieving successful pregnancies through assisted reproductive technologies (ART). Advanced-age women often face diminished oocyte quantity and quality, resulting in fewer transferable embryos during IVF cycles. Optimizing reproductive outcomes for this demographic remains a critical clinical challenge.

Data Highlights

OutcomeEmbryo Accumulation GroupControl GroupP-value
Biochemical Pregnancy RateHigherLower< 0.001
Cumulative Live Birth Rate (CLBR)Higher (OR = 2.75)Lower< 0.001
Cumulative Clinical Pregnancy Rate (CCPR)Higher (OR = 2.71)Lower< 0.001
Miscarriage RateNo significant differenceNo significant difference0.583

Key Findings

  • Embryo accumulation significantly increased CLBR and CCPR in advanced-age women.
  • Higher CLBR and CCPR were observed when the cumulative embryo number was ≤ 2.
  • No significant difference in miscarriage rates between the embryo accumulation and control groups.
  • Propensity score matching was utilized to eliminate baseline confounding bias.
  • Binary logistic regression confirmed the correlation between embryo accumulation and improved reproductive outcomes.

Clinical Implications

Clinical decisions should consider individual patient assessments beyond embryo quantity.

Conclusion

Embryo accumulation through consecutive stimulation cycles can improve reproductive outcomes in advanced-age women receiving IVF/ICSI.

Related Resources & Content

  1. Frontiers in Medicine, 2026 -- Clinical pregnancy after ICSI: an exploratory transfer-day analysis of female age, AMH, sperm source, and transfer stage
  2. Frontiers in Endocrinology, 2026 -- Effect of basal LH levels on pregnancy outcome after IVF/ICSI fresh embryo transfer in patients of different ages: a retrospective study
  3. The Journal of Clinical Endocrinology & Metabolism -- Effects of Negative Pregnancy Experiences in the First IVF Cycle on Future Pregnancy Results
  4. Frontiers in Reproductive Health, 2026 -- A prospective descriptive cohort study of women aged ≥40 years conceiving through IVF at a tertiary care center
  5. ESHRE guideline update, 2025 -- Ovarian stimulation update
  6. ESHRE guideline: number of embryos to transfer during IVF/ICSI
  7. Frozen versus fresh embryo transfer in women with low prognosis for in vitro fertilisation treatment: pragmatic, multicentre, randomised controlled trial
  8. https://www.eshre.eu/-/media/sitecore-files/Guidelines/COS/2025/ESHRE-OS-guideline-updateNov-2025v22.pdf
  9. ESHRE guideline: number of embryos to transfer during IVF/ICSI†

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