7 Kasım 2010 Pazar

birth control patch


What Is It?
The birth control patch is a thin, beige, 1¾-inch (4½-centimeter) square patch that sticks to the skin. It releases hormones through the skin into the bloodstream to prevent pregnancy. Hormones are chemical substances that control the functioning of the body's organs.
How Does It Work?


The combination of the hormones progesterone and estrogen in the patch prevents ovulation (the release of an egg from the ovaries during a girl's monthly cycle). If an egg isn't released, a girl can't get pregnant because there's nothing for a guy's sperm to fertilize.

http://kidshealth.org

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