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Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

A vasectomy, showing how each vas deferens is tied off in two places and then a section is removed f A vasectomy, showing how each vas deferens is tied off in two places and then a section is removed f
The Black Death spread over much of Europe in a three-year period in the middle of the fourteenth ce The Black Death spread over much of Europe in a three-year period in the middle of the fourteenth ce
Major trunk lines carrying long-distance traffic crisscrossed the area east of the Mississippi. The Major trunk lines carrying long-distance traffic crisscrossed the area east of the Mississippi. The
Infants and Children Prenatal Through Middle Childhood — 7e Infants and Children Prenatal Through Middle Childhood — 7e
The frequency distribution of the allele in Africa, Southern Europe, the Middle East The frequency distribution of the allele in Africa, Southern Europe, the Middle East
Video: Fetal Development of the Cardiovascular System

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