A<unk> , also known as "the<unk> ", is a transdermal<unk>  applied to the skin that releases synthetic oestrogen and progestogen hormones to prevent pregnancy. They have been shown to be as effective as the combined oral contraceptive pill with perfect use, and the<unk>  may be more effective in typical use. Xulane and Twirla are approved for use in the United States. Evra is approved for use in Canada and marketed by Janssen Inc., and it is approved for use in the United Kingdom and in Europe and marketed by Janssen-Cilag. The<unk> es are packaged in boxes of three and are only available by prescription.
Contraceptive patch
Contraceptive sponge
Heat-based contraception
Contraceptive implant
Vaginal microbicide
Rectal microbicide
Contraceptive vaginal ring
Antiseptic douche