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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.