title: Contraception.
authors.forename: R J
authors.initials: RJ
authors.lastname: Wolley
mesh_terms: D003271:Contraceptive Agents, Female; D004343:Drug Implants; D005260:Female; D006801:Humans; D016912:Levonorgestrel; D009644:Norgestrel; D013237:Stereoisomerism
chemical_list: D003271:Contraceptive Agents, Female; D004343:Drug Implants; D009644:Norgestrel; D016912:Levonorgestrel