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Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

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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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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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Video: Hormonal regulation of pregnancy - weeks 17 through 38

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