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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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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.