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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

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By definition, when a medication is administered intravenously, its bioavailability is 100%.

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Video: Phases of the ovarian cycle

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