پیشگیری از بارداری مرد: چشم انداز صدا و سونوگرافی

These concepts have been explored in basic research in many animal species as well as humans. To achieve an adequate totality of evidence, the test of this hypothesis requires further basic research in humans to clarify the relevant mechanisms, clinical and observational epidemiologic studies to further explore the hypothesis, and large-scale randomized trials to detect the most plausible magnitude of benefits of this promising but unproven technology. It is plausible that this technology will represent a major breakthrough to combat world population growth. It is also plausible, that, to paraphrase Thomas Huxley, this beautiful hypothesis will be slain by ugly facts.