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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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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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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.