Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Birth control refers to techniques and methods used to prevent fertilization or to interrupt pregnancy at various stages, such as contraception, contragestion and abortion. Contraception includes barrier methods, such as condoms or diaphragm, hormonal contraception, also known as oral contraception, and injectable contraceptives. Contragestives, also known as post-coital birth control, include intrauterine devices and what is known as the morning after pill. Learn more about the various methods of birth control - contraceptive, congestive, as well as abortion – and their comparisons in this book.