Sex difference in anti-sperm antibodies

Area of Science:

• Reproductive Immunology
• Immunology
• Sex Differences in Medicine

Background:

• Sex differences exist in various diseases, yet their role in anti-sperm antibodies (ASA) remains under-explored.
• No prior studies have investigated the relationship between ASA and sex differences.

Purpose of the Study:

• To highlight the importance of sex differences in the context of anti-sperm antibodies (ASA).
• To emphasize the need for sex-specific diagnostic and therapeutic approaches for ASA.

Main Methods:

• ASA detection in women utilizes the sperm-immobilization test with patient sera.
• ASA testing in men typically employs the direct-immunobead test.

Main Results:

• Sperm-immobilizing antibodies in women impede sperm migration and fertilization.
• In men, ASA on sperm surfaces hinder passage through cervical mucus, reducing IVF success rates.
• Specific diagnostic titers (SI50) are crucial for women, while intracytoplasmic sperm injection is indicated for men with ASA-induced infertility.

Conclusions:

• Diagnostic methods and interpretation of ASA results should account for sex-specific differences.
• Tailoring treatment strategies based on sex is essential for managing patients with ASA.