Skin Patch
Only used by approximately 1% of women, the skin patch, also known as Evra, is an effective external version of the contraceptive pill which you stick onto the skin and works by releasing hormones that stop you from getting pregnant. As with most contraceptive methods this self-adhesive patch (which must be changed every seven days) does come with possible side effects including headaches, nausea and symptoms that are similar to flu. This method does not act as a barrier to STIs.