Sperm DNA fragmentation is related to sperm morphological staining patterns.

Area of Science:

• Reproductive Biology
• Andrology
• Genetics

Background:

• Sperm DNA fragmentation (sDNAfrag) is a key indicator of male infertility.
• Semen preparation methods aim to isolate motile, viable sperm for assisted reproductive technologies.
• The impact of sequential semen preparation steps on sDNAfrag requires detailed investigation.

Purpose of the Study:

• To evaluate the effect of sequential semen preparation steps on sperm DNA fragmentation.
• To correlate sDNAfrag levels with semen parameters at different preparation stages.
• To assess the safety of semen preparation techniques for sperm DNA integrity.

Main Methods:

• Prospective comparative study involving 70 infertile men undergoing intracytoplasmic sperm injection.
• sDNAfrag was measured at sequential steps: raw semen, post-gradient centrifugation, post-washing, and post-swim-up (SU).
• Correlation analysis between sDNAfrag and semen parameters (motility, quality) was performed.

Main Results:

• sDNAfrag significantly decreased throughout the semen preparation steps (P = 0.04; P < 0.0001).
• Centrifugation and washing did not increase sDNAfrag; swim-up further reduced it.
• Higher sDNAfrag was observed in samples with lower baseline semen quality.
• A negative correlation between sDNAfrag and sperm motility was noted in raw and SU fractions.

Conclusions:

• Sequential semen preparation progressively decreases sDNAfrag without compromising sperm DNA integrity.
• The procedure is safe and beneficial across varying degrees of sperm abnormalities and semen quality.
• Pattern quantification of sDNAfrag may serve as a valuable tool in male infertility diagnostics.