title: An analysis of vaginal bleeding patterns in users of Norplant implants.
authors.forename: M K
authors.initials: MK
authors.lastname: Du
authors.forename: C H
authors.initials: CH
authors.lastname: Chen
authors.forename: H M
authors.initials: HM
authors.lastname: Zheng
mesh_terms: D001208:Asia; D002681:China; D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003906:Developing Countries; D004194:Disease; D005193:Family Planning Services; D005202:Asia, Eastern; D016912:Levonorgestrel; D008599:Menstruation Disturbances; D015995:Prevalence; D011446:Prospective Studies; D012106:Research; D012107:Research Design
chemical_list: D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D016912:Levonorgestrel
keywords: Asia; China; Contraception; Contraceptive Agents, Female--pharmacodynamics; Contraceptive Agents, Progestin--pharmacodynamics; Contraceptive Agents--pharmacodynamics; Contraceptive Implants--side effects; Contraceptive Methods--side effects; Developing Countries; Diseases; Eastern Asia; Family Planning; Levonorgestrel--pharmacodynamics; Measurement; Menstruation Disorders; Prevalence--changes; Prospective Studies; Research Methodology; Research Report; Studies