Which antibodies recognize and bind to antigens on the surface of the spermatozoon?

Which antibodies recognize and bind to antigens on the surface of the spermatozoon?

• A. Antibodies against ova
• B. Antibodies to zona pellucida
• C. Antibodies to cervical mucus
• D. Antibodies that recognize and bind to antigens on the surface of the spermatozoon

Answer: (D)

Anti-sperm antibodies recognize and bind to antigens on the surface of the spermatozoon. This directly targets the sperm cell itself, which is why it best explains how antibodies can interfere with fertilization—by binding to surface antigens, they can cause immobilization, clumping, or block the sperm’s ability to interact with the oocyte. The other options describe antibodies that bind to non-sperm structures: antibodies against ova target the egg itself; antibodies to zona pellucida bind to the egg’s outer layer and prevent binding; and antibodies to cervical mucus bind to mucus components rather than the sperm surface.

Anti-sperm antibodies recognize and bind to antigens on the surface of the spermatozoon. This directly targets the sperm cell itself, which is why it best explains how antibodies can interfere with fertilization—by binding to surface antigens, they can cause immobilization, clumping, or block the sperm’s ability to interact with the oocyte. The other options describe antibodies that bind to non-sperm structures: antibodies against ova target the egg itself; antibodies to zona pellucida bind to the egg’s outer layer and prevent binding; and antibodies to cervical mucus bind to mucus components rather than the sperm surface.