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Related Experiment Videos

Human sperm morphology evaluation pre- and post-Percoll gradient centrifugation

J A Hall1, S B Fishel, J A Timson

  • 1NURTURE (Nottingham University Research & Treatment Unit in Reproduction), Department of Obstetrics and Gynaecology, University Hospital, UK.

Human Reproduction (Oxford, England)
|February 1, 1995
PubMed
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Percoll gradient centrifugation (PGC) improves sperm morphology in patients with moderate teratozoospermia. However, PGC is less effective for severe teratozoospermia, failing to significantly enhance sperm quality in these cases.

Area of Science:

  • Human Reproduction
  • Andrology
  • Sperm Morphology Analysis

Background:

  • Sperm morphology is linked to in vitro fertilization (IVF) potential.
  • Teratozoospermia, characterized by abnormal sperm morphology, affects male fertility.
  • Percoll gradient centrifugation (PGC) is a sperm selection technique.

Purpose of the Study:

  • To evaluate the efficiency of Percoll gradient centrifugation (PGC) in improving sperm morphology.
  • To assess PGC's effectiveness across different severities of teratozoospermia.

Main Methods:

  • Morphological characteristics of spermatozoa from 86 teratozoospermic patients were analyzed.
  • Patients were grouped based on normal morphology percentages (<5%, 5-14%, >14%).
  • Sperm morphology was assessed using Kruger strict criteria after Diff Quik staining.

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Main Results:

  • PGC significantly improved sperm morphology in groups with 5-14% (P < 0.01) and >14% (P < 0.005) normal morphology.
  • PGC did not yield a significant morphological improvement for the group with <5% normal morphology (severe teratozoospermia).
  • PGC effectively selected against head, neck, and immature cell defects, but not tail abnormalities or cytoplasmic fragments.

Conclusions:

  • Percoll gradient centrifugation (PGC) is effective in selecting morphologically superior sperm for patients with moderate to mild teratozoospermia.
  • PGC demonstrates limited efficacy in improving sperm quality for cases of severe teratozoospermia.
  • Specific sperm defects, including head and neck abnormalities, are targeted by PGC, while tail defects are not.