[Norplant, new method of contraception in Portugal].
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D001723:Birth Rate; D003267:Contraception; D003268:Contraception Behavior; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003710:Demography; D019049:Developed Countries; D004194:Disease; D005060:Europe; D005193:Family Planning Services; D005298:Fertility; D016912:Levonorgestrel; D008599:Menstruation Disturbances; D010342:Patient Acceptance of Health Care; D011153:Population; D011157:Population Dynamics; D011174:Portugal; D018873:Pregnancy Rate
D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D016912:Levonorgestrel
Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Agents, Progestin; Contraceptive Effectiveness; Contraceptive Implants--contraindications; Contraceptive Implants--side effects; Contraceptive Methods--contraindications; Contraceptive Methods--side effects; Contraceptive Usage; Demographic Factors; Developed Countries; Diseases; Europe; Family Planning; Fertility; Fertility Measurements; Levonorgestrel; Menstruation Disorders; Method Acceptability; Population; Population Dynamics; Portugal; Pregnancy Rate; Southern Europe