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During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
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Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects
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Elevated sperm DNA fragmentation does not predict recurrent implantation failure.

Jordan C Best1, Taylor Kohn2, Premal Patel3

  • 1Department of Urology, University of Miami Miller School of Medicine, Miami, FL, USA.

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|May 7, 2021
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Summary
This summary is machine-generated.

Sperm DNA fragmentation and high DNA stainability do not predict recurrent implantation failure or pregnancy rates in ICSI cycles. These sperm chromatin measures, assessed by SCSA, lack predictive value for IVF success.

Keywords:
DNA fragmentationhigh DNA stainabilityin vitro fertilizationintracytoplasmic sperm injectionrecurrent implantation failure

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Area of Science:

  • Reproductive Medicine
  • Andrology
  • Infertility Research

Background:

  • Recurrent implantation failure (RIF) remains a significant challenge in assisted reproductive technologies.
  • Sperm DNA integrity, assessed by DNA fragmentation index (DFI%) and high DNA stainability (HDS%), is increasingly investigated as a potential factor in RIF and pregnancy outcomes.

Purpose of the Study:

  • To evaluate the predictive value of DFI% and HDS%, measured by Sperm Chromatin Structure Assay (SCSA), for recurrent implantation failure (RIF) and clinical pregnancy rates following ICSI and frozen embryo transfer (FET).

Main Methods:

  • A retrospective analysis of 1,216 FET cycles from 386 couples undergoing ICSI between 2009 and 2018.
  • Sperm DFI% and HDS% were assessed using SCSA.
  • Multivariable analysis was employed to determine the association between DFI%/HDS% and RIF or clinical pregnancy rates.

Main Results:

  • Neither DFI% nor HDS% showed a statistically significant association with RIF.
  • DFI% and HDS% were not predictive of clinical pregnancy rates in ICSI cycles.
  • The study found no significant correlation between sperm DNA integrity markers and IVF success or implantation failure.

Conclusions:

  • Sperm DNA fragmentation index and high DNA stainability, as evaluated by SCSA, are not reliable predictors of recurrent implantation failure or pregnancy rates in patients undergoing ICSI.
  • These findings suggest that routine assessment of DFI% and HDS% may not be beneficial for predicting outcomes in FET cycles.