Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
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The horizontal fraction bar was introduced by the Arabs.
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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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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
Selected Estrogens and Progestins
Selected Complications of Total Parenteral Nutrition
Water Solubility of Selected Chemicals
Nutrition-related research findings are often lead stories in newspapers, magazines, and on websites
Topic Media
Population age 65 and over and age 85 and over, selected years 1900-2008 and projected 2010-2050.