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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

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Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

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Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Hydronephrosis. Normal kidney (left) and kidney with hydronephrosis (right) are compared. Note the d Hydronephrosis. Normal kidney (left) and kidney with hydronephrosis (right) are compared. Note the d
Internal structures at the back of the eye. Internal structures at the back of the eye.
Good body mechanics for lifting heavy objects. Good body mechanics for lifting heavy objects.
Major back and shoulder muscles. Major back and shoulder muscles.
Rhythmic sliding compression down both sides of the spine, with palmar friction back up to ... Rhythmic sliding compression down both sides of the spine, with palmar friction back up to ...
Older Adults Benefit from Good Nutrition and Physical Activity Older adults Older Adults Benefit from Good Nutrition and Physical Activity Older adults
Video: Labor and Childbirth - The Three Stages of Labor: Dilation, Expulsion & Placental مراحل الولادة

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