title: Progestin-only methods are very effective.
authors.forename: S
authors.initials: S
authors.lastname: Keller
mesh_terms: D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D005193:Family Planning Services
chemical_list: D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female
keywords: Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Agents, Progestin; Contraceptive Effectiveness; Contraceptive Mode Of Action; Family Planning