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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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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The familiar sounds of your heart are made by the heart's valves as they open and close.