[Norplant contraceptive method gains ground. Approved for distribution in the United States].
D000349:Africa; D017954:Africa South of the Sahara; D000569:Americas; D003257:Consumer Product Safety; D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D019049:Developed Countries; D003906:Developing Countries; D005193:Family Planning Services; D006805:Human Experimentation; D007878:Legislation as Topic; D016912:Levonorgestrel; D009656:North America; D012106:Research; D014481:United States
D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D016912:Levonorgestrel
Africa; Africa South Of The Sahara; Americas; Clinical Research; Contraception; Contraceptive Agents, Female--administraction and dosage; Contraceptive Agents, Progestin--administraction and dosage; Contraceptive Agents--administraction and dosage; Contraceptive Implants; Contraceptive Methods; Developed Countries; Developing Countries; Family Planning; Human Volunteers--women; Legislation; Levonorgestrel--administraction and dosage; North America; Northern America; Product Approval; Research Methodology; United States