Friday, June 12, 2009

Condom

INTRODUCTION
Condom, type of birth control in the form of a physical barrier that prevents sperm from reaching and fertilizing an egg. Condoms are available for use by both men and women. The male condom is a thin, form-fitting sheath worn on the erect penis during sexual intercourse (see Human Sexuality). The female condom, approved for use in the United States in 1993 by the Food and Drug Administration (FDA), consists of a thin polyurethane pouch with a ring on each end. The smaller, closed ring is placed inside the vagina and the larger, open ring remains outside the body at the opening of the vagina.

MALE CONDOM
Male condoms have been used for thousands of years, dating back to ancient Egypt when men wore colorful sheaths to cover their penises. Condoms were first used to prevent sexually transmitted diseases (STDs) and pregnancy in the 1600s when King Charles II of England used condoms made of sheep intestines. Early versions of the modern condom were developed and became popular in the 18th century.

Today about 18 percent of American women 15 to 44 years old who use contraception rely on male condoms. Condoms are the most common form of birth control among teenagers, single women, women with no children, and women who want to have additional children. With typical use, condoms are 84 percent effective in preventing pregnancy.

The male condom must be placed on the erect penis before the penis is inserted into the vagina. A condom can be used only once and should be removed immediately after ejaculation to prevent sperm from leaking out or the condom from slipping off.

Most male condoms are made of latex, although a small number of condoms available in the United States are made of animal tissue such as sheep membrane. Only latex condoms provide protection against STDs, including human immunodeficiency virus (HIV), which causes acquired immunodeficiency syndrome (AIDS).

Male condoms are available without prescription in retail stores. They may be dry or lubricated and may contain spermicide (foam or jelly that kills sperm). Condoms with spermicide provide additional contraceptive protection, especially if the condom accidentally breaks or slips off. Condoms with spermicide may also increase protection against STDs. Lubricated condoms do not offer additional contraceptive or STD protection, but lubrication may help prevent the condom from tearing during intercourse. Dry condoms can be lubricated with water-based products or contraceptive foams or jellies, but they should never be coated with oil-based products such as petroleum jelly, since these products can weaken the latex and cause the condom to tear.

Condoms may break, tear, or slip off during intercourse. Condoms stored close to the body, such as in a pants pocket, may break or tear more readily because heat harms the latex. A couple must interrupt sexual activity to put on a condom before sexual intercourse. In addition, some men object to the change in sensation associated with wearing a condom. An allergy to latex prevents some individuals from using condoms.

FEMALE CONDOM
The female condom acts as a barrier by forming a sheath between the penis and the vagina, preventing sperm from reaching and fertilizing an egg. The female condom is made of plastic so it can be used with both water- and oil-based lubricants. Like the male condom, it should be used only once and removed immediately after ejaculation. With typical use, the female condom’s effectiveness in preventing pregnancy is 79 percent. It is not yet clear how much protection the female condom provides against STDs.

The female condom is available without a prescription in retail stores. It can be inserted in the vagina several hours before intercourse. Some users find it difficult to insert. In addition, the outer ring can slip into the vagina and the condom can twist during intercourse. Some couples find it irritating to the penis or the vagina.