Скачать или смотреть Birth Control Methods and Options.

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Chapters

0:00 Introduction
1:32 Methods of Birth Control


Birth control, also known as contraception, anticonception, and fertility control, is a method or device used to prevent pregnancy.[1] Birth control has been used since ancient times, but effective and safe methods of birth control only became available in the 20th century.[2] Planning, making available, and using birth control is called family planning.[3][4] Some cultures limit or discourage access to birth control because they consider it to be morally, religiously, or politically undesirable.[2]

The World Health Organization and United States Centers for Disease Control and Prevention provide guidance on the safety of birth control methods among women with specific medical conditions.[5][6] The most effective methods of birth control are sterilization by means of vasectomy in males and tubal ligation in females, intrauterine devices (IUDs), and implantable birth control.[7] This is followed by a number of hormone-based methods including oral pills, patches, vaginal rings, and injections.[7] Less effective methods include physical barriers such as condoms, diaphragms and birth control sponges and fertility awareness methods.[7] The least effective methods are spermicides and withdrawal by the male before ejaculation.[7] Sterilization, while highly effective, is not usually reversible; all other methods are reversible, most immediately upon stopping them.[7] Safe sex practices, such as with the use of male or female condoms, can also help prevent sexually transmitted infections.[8] Other methods of birth control do not protect against sexually transmitted diseases.[9] Emergency birth control can prevent pregnancy if taken within 72 to 120 hours after unprotected sex.[10][11] Some argue not having sex is also a form of birth control, but abstinence-only sex education may increase teenage pregnancies if offered without birth control education, due to non-compliance.