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Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
Did you know?
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.