The human sperm hypoosmotic swelling test: its practical application and suggestions for improvement

Area of Science:

• Andrology
• Reproductive Medicine
• Clinical Diagnostics

Background:

• Male infertility affects a significant portion of couples seeking fertility treatment.
• Accurate diagnostic tools are crucial for identifying the causes of male infertility.
• Traditional semen analysis parameters (concentration, motility, morphology) have limitations.

Purpose of the Study:

• To evaluate the diagnostic utility of the sperm hypoosmotic swelling (HS) test in male infertility.
• To compare the HS test with the sperm penetration assay (SPA) and standard semen parameters.
• To determine the correlation between the HS test and specific semen parameters.

Main Methods:

• Semen samples from 209 infertile males were analyzed.
• Evaluated using the sperm hypoosmotic swelling (HS) test.
• Compared with in vitro human sperm zona-free hamster ovum penetration assay (SPA) and standard semen parameters (concentration, motility, morphology).

Main Results:

• The HS test and SPA showed poor correlation with each other.
• The HS test demonstrated a significant correlation with sperm motility.
• This correlation was particularly evident in semen samples with oligozoospermia, asthenozoospermia, and teratozoospermia.

Conclusions:

• The sperm hypoosmotic swelling (HS) test is a simple, cost-effective method for assessing male fertility.
• The HS test shows promise as a valuable diagnostic tool in male infertility evaluations.
• It may serve as a useful adjunct to traditional semen analysis, particularly for identifying impaired sperm function.