Others have argued that a hCG-laced vaccine could not possibly be used for sterilization, since the effects of the anti-fertility vaccines are reversible (requiring booster doses to maintain infertility) and a non-conjugated vaccine is likely to be ineffective. Finally, independent testing of the tetanus vaccine by Kenyas health authorities revealed no traces of the human chorionic gonadotropin hormone. See also
Equine chorionic gonadotropin
Gonadotropin preparations
Human placental lactogen
Triple test - a screening test in pregnancy
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References
External links
Chorionic+Gonadotropin at the US National Library of Medicine Medical Subject Headings (MeSH)
History of pregnancy test (NIH)
They may also show the underlying cause and the extent to which the disease has progressed. Treatment
Several methods of treatment are available, mainly consisting of careful drug therapy and surgery. Glucocorticoids (such as prednisone or methylprednisolone) decrease the inflammatory response to tumor invasion and edema surrounding the tumor. Glucocorticoids are most helpful if the tumor is steroid-responsive, such as lymphomas. In addition, diuretics (such as furosemide) are used to reduce venous return to the heart which relieves the increased pressure.In an acute setting, endovascular stenting by an interventional radiologist may provide relief of symptoms in as little as 12–24 hours with minimal risks.Should a patient require assistance with respiration whether it be by bag/valve/mask, bilevel positive airway pressure (BiPAP), continuous positive airway pressure (CPAP) or mechanical ventilation, extreme care should be taken. Increased airway pressure will tend to further compress an already compromised SVC and reduce venous return and in turn cardiac output and cerebral and coronary blood flow. Spontaneous respiration should be allowed during endotracheal intubation until sedation allows placement of an ET tube and reduced airway pressures should be employed when possible. Prognosis
Symptoms are usually relieved with radiation therapy within one month of treatment. However, even with treatment, 99% of patients die within two and a half years. This relates to the cancerous causes of SVC found in 90% of cases. The average age of disease onset is 54 years. See also
Pembertons sign

References
Further reading
Wilson LD, Detterbeck FC, Yahalom J (May 2007). "Clinical practice. Superior vena cava syndrome with malignant causes". N Engl J Med.