Comparison of Diff-Quick and Spermac Staining Methods for Sperm Morphology Evaluation

Area of Science:

• Andrology
• Reproductive Medicine
• Clinical Pathology

Background:

• Accurate semen analysis is vital for diagnosing male infertility.
• Staining techniques significantly influence the assessment of sperm morphology.
• An ideal method preserves cell integrity and provides detailed morphological information.

Purpose of the Study:

• To compare the impact of Diff-Quick and Spermac staining methods on semen morphology.
• To evaluate how these staining techniques influence the diagnosis of male infertility.

Main Methods:

• Fifty semen samples were stained using Diff-Quick or Spermac.
• Sperm morphology was assessed using Tygerberg criteria.
• Statistical analysis included paired t-tests, Wilcoxon rank-sum tests, GLIMMIX, and Fisher's exact test.

Main Results:

• Spermac provided better midpiece visualization but showed fewer normal spermatozoa (2.8%) compared to Diff-Quick (3.98%).
• Midpiece abnormalities were significantly higher with Spermac (55.7%) versus Diff-Quick (24.8%).
• No significant differences were observed in head or tail abnormalities between the two methods.

Conclusions:

• Diff-Quick staining yields a higher proportion of normal spermatozoa, largely due to superior midpiece assessment.
• The choice of staining method critically affects the diagnosis of male infertility.
• Further research is needed to optimize staining methods and diagnostic thresholds for clinical practice.