The human sperm-hamster egg penetration assay: prognostic value.

Area of Science:

• Reproductive Medicine
• Andrology
• Infertility Diagnostics

Background:

• Male infertility affects a significant portion of infertile couples.
• Standard semen analyses do not always correlate with fertility potential.
• The human sperm-hamster egg penetration assay (SPA) is a functional test of sperm-oocyte interaction.

Purpose of the Study:

• To evaluate the prognostic value of the sperm-hamster egg penetration assay (SPA) in infertile males.
• To assess the correlation between SPA results and subsequent conception rates.
• To determine the diagnostic utility of SPA in cases of unexplained infertility, abnormal semen parameters, and sperm antibodies.

Main Methods:

• Evaluated 227 infertile males using the human sperm-hamster egg penetration assay (SPA).
• Classified SPA results into normal (≥11% penetration), intermediate (1-10% penetration), and non-penetrating (<1% penetration).
• Monitored conception rates and calculated monthly fecundity using Kaplan-Meier survival analysis with Cox correction over a mean follow-up of 17.9 months.

Main Results:

• 58.6% of couples achieved normal SPA results.
• 25.6% had intermediate penetration, and 15.9% showed no penetration.
• Couples with normal SPA values had a monthly fecundity rate twice as high as those with abnormal SPA values (0.014 vs. 0.007).
• 26.9% of couples conceived during the follow-up period, irrespective of treatment or specific diagnoses.

Conclusions:

• The sperm-hamster egg penetration assay (SPA) is a valuable prognostic tool for male infertility.
• Normal SPA results are associated with significantly higher monthly fecundity rates.
• SPA provides predictive information on fertility potential beyond traditional semen analysis and other diagnostic indicators.