Hormonal methods of birth control (contraception) contain either estrogen and progestin, or progestin only; they are a safe and reliable way to prevent pregnancy for most women. Hormonal methods include an implant, an intrauterine device (IUD), injections, pills, a ring, and a skin patch
B) Inhalation, breathing something in will have it enter your system the quickest
enteral, through eating or by mouth
topical, on the skin
parenteral, both trough eating/mouth or yer um... bum