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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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Your heart beats over 36 million times a year.
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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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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.