title: New contraceptive vaccines, implants may prove promising.
mesh_terms: D003267:Contraception; D003269:Contraception, Immunologic; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D005193:Family Planning Services; D016912:Levonorgestrel; D022642:Vaccines, Contraceptive
chemical_list: D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D022642:Vaccines, Contraceptive; D016912:Levonorgestrel
keywords: Contraception; Contraception Research; Contraception, Immunological; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Agents, Progestin; Contraceptive Implants; Contraceptive Methods; Contraceptive Vaccines; Family Planning; Levonorgestrel; Male Contraception