Contraceptive implants.
Bromham
D R
DR
D002755:Choice Behavior; D003142:Communication; D003270:Contraceptive Agents / Q000008:administration & dosage*; D004343:Drug Implants; D005260:Female; D006801:Humans; D016912:Levonorgestrel
D003270:Contraceptive Agents; D004343:Drug Implants; D016912:Levonorgestrel