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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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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The average office desk has 400 times more bacteria on it than a toilet.
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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
California sea lion (Zalophus californianus)
American Water Spaniel
The Canadian ballot is considerably simpler than the American ballot. Note there is nothing like a c