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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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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.