title: Emergency contraception.
abstract: Emergency contraception is the only form of contraception where implementation can occur after sexual relations or forced intercourse. Hormonal methods can be administered up to 72h after unprotected intercourse. Emergency contraception is safe, legal, and simple to administer. Widespread availability could dramatically decrease the number of unwanted pregnancies.
authors.affiliation: Department of Human Reproduction, Hospital of the University of Pennsylvania, Philadelphia.
authors.forename: K T
authors.initials: KT
authors.lastname: Barnhart
authors.forename: S J
authors.initials: SJ
authors.lastname: Sondheimer
mesh_terms: D003267:Contraception / Q000379:methods*; D004630:Emergencies; D004967:Estrogens / Q000008:administration & dosage / Q000009:adverse effects; D005260:Female; D006801:Humans; D011247:Pregnancy; D011275:Pregnancy, Unwanted; D011374:Progesterone / Q000008:administration & dosage / Q000009:adverse effects; D011372:Progestins / Q000008:administration & dosage; D016896:Treatment Outcome
chemical_list: D004967:Estrogens; D011372:Progestins; D011374:Progesterone