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People about to have surgery must tell their health care providers about all supplements they take.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.