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建立人际资源圈Birth_Control
2013-11-13 来源: 类别: 更多范文
Birth Control
Womens health concerns
Birth control is a way to prevent pregnancy. While there are many different types of birth control, they all fall into two different categories: barrier and hormonal. Barrier methods basically block the sperm from getting to the egg. Condoms (both male and female), diaphragms and cervical caps are all barrier methods of birth control. Hormonal methods basically change the menstrual and ovulation cycle to prevent a female from releasing an egg from her ovaries, known as ovulation. That makes it nearly impossible for a pregnancy to happen. Birth control pills (the Pill), Depo-Provera (the shot), and the birth control patch are all hormonal methods of birth control.
Certain types of birth control, like Depo-Provera and The Pill, are 98 to 99 percent effective. But, only if theyre used properly. Human error is a huge factor in whether birth control works. Its so important that manufacturers actually have two different rates of effectiveness. One is with perfect use in a laboratory, where theres no room for mistakes. The other is the real world rate, which takes into account the occasional broken condom and the couple of nights you forgot your pill. Of course, the perfect use rate
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