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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
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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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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.