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Updated: May 20, 2026

Fluorimetric Techniques for the Assessment of Sperm Membranes

Fluorimetric Techniques for the Assessment of Sperm Membranes

Published on: November 28, 2018

Supersensitive fluorescent semen analysis: validation on azoospermic and oligozoospermic samples.

Claire E Beyer¹, Bettina Kayler, Elissa Osborne

¹Monash IVF, Clayton, Victoria, Australia. cbeyer@monashivf.com

Fertility and Sterility

|July 24, 2012

Summary

A new supersensitive fluorescent semen analysis (SSSA) detects sperm in 22% of men previously diagnosed with azoospermia. This improved sensitivity aids fertility assessment and assisted reproductive technique decisions.

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Area of Science:

Reproductive Medicine
Andrology
Clinical Diagnostics

Background:

Accurate semen analysis is crucial for male fertility assessment.
Distinguishing severe oligospermia from azoospermia significantly impacts fertility management strategies.
Conventional World Health Organization (WHO)-based semen analysis has limitations in detecting low sperm counts.

Purpose of the Study:

To compare the clinical utility of a supersensitive fluorescent semen analysis (SSSA) with conventional WHO-based semen analysis.
To evaluate the effectiveness of SSSA in identifying spermatozoa in men with severe oligozoospermia or azoospermia undergoing fertility assessment.

Main Methods:

Prospective single-center study conducted in an IVF clinic.
Semen samples from 100 men with severe oligozoospermia or azoospermia were analyzed.

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Last Updated: May 20, 2026

Fluorimetric Techniques for the Assessment of Sperm Membranes

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Comparison of conventional WHO 4th Edition semen analysis (lower limit of detection: 0.1 million sperm/mL) with SSSA (lower limit of detection: ~8000 sperm/mL).

Main Results:

SSSA confirmed conventional semen analysis results in 77% of cases.
Sperm were identified exclusively by SSSA in 22% of samples.
SSSA demonstrated significantly higher sperm detection rates compared to conventional semen analysis.

Conclusions:

Approximately 22% of men diagnosed with azoospermia via conventional methods may have detectable sperm using SSSA.
The enhanced sensitivity of SSSA offers significant benefits for fertility management and assisted reproductive technique decision-making.
Reliable differentiation of extreme oligospermia from azoospermia is critical for effective patient care.