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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

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The horizontal fraction bar was introduced by the Arabs.

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Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Paranasal sinuses are part of the upper respiratory system. Paranasal sinuses are part of the upper respiratory system.
Drawing shows what is occurring electrically at each part of the scope pattern. Drawing shows what is occurring electrically at each part of the scope pattern.
How to find the derivatives of inverse trigonometric functions (Part 2) How to find the derivatives of inverse trigonometric functions (Part 2)
Catalysis of peptide bond hydrolysis by chymotrypsin (part 2) Catalysis of peptide bond hydrolysis by chymotrypsin (part 2)
How to calculate compound interest (Part 2) How to calculate compound interest (Part 2)
Phosphorus in Phospholipids Phosphorus makes up part of the phospholipids found in cell membranes Phosphorus in Phospholipids Phosphorus makes up part of the phospholipids found in cell membranes
Video: Requirements for nervous signals

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