Changes

'''Contraception''' (or '''birth control''') refers to techniques, [[drug]]s, or devices that prevent [[pregnancy|conception]]. There are many different methods, each having its own level of effectiveness and safety. The only known method that is 100% effective is [[abstinence]]. [[Abstinence]] during fertile times can take the place of artificial form forms of birth control. <ref> "When a couple for serious reasons abstain from intercourse at times at which they might conceive, their abstaining is itself chosen sexual behavior, and virtuous sexual behavior because it is expressive of a recognition of the demands of the pro creative good." [http://www.linacre.org/contra.html Linacre.org] </ref>