Prospective study of contraception with levonorgestrel.
Chernev
T
T
Ivanov
S
S
Dikov
I
I
Stamenkova
R
R
D001519:Behavior; D002031:Bulgaria; D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003281:Contraceptives, Postcoital; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D005193:Family Planning Services; D016912:Levonorgestrel; D010349:Patient Compliance; D011446:Prospective Studies; D012106:Research
D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003281:Contraceptives, Postcoital; D016912:Levonorgestrel
Behavior; Bulgaria; Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Agents, Female--side effects; Contraceptive Agents, Postcoital--side effects; Contraceptive Agents, Progestin; Contraceptive Agents--side effects; Contraceptive Effectiveness; Developed Countries; Eastern Europe; Europe; Family Planning; Levonorgestrel; Prospective Studies; Research Methodology; Studies; User Compliance