| 摘要 |
<p>Currently, one approach to achieving control over reproduction and sex related behaviors is though surgery. Several alternative methods include the use of drugs that mimic or antagonize reproductive hormones, or injection of chemicals directly into the testes that destroy reproductive tissues. Animals and humans can be vaccinated so as to induce the creation of antibodies that bind to, and neutralize or destroy proteins or pathogens foreign to the body. Animals can also be vaccinated so as to generate antibodies that bind to proteins normally present in the body, though the responses mounted are often attenuated and transient as compared with those mounted to non-self antigens.</p> |
