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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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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.