Ethics of contraceptive research: some issues.
D003267:Contraception; D003276:Contraceptives, Oral; D003906:Developing Countries; D005260:Female; D006805:Human Experimentation / Q000941:ethics*; D006801:Humans; D007114:Immunization; D016912:Levonorgestrel; D013245:Sterilization, Reproductive; D014930:Women
D003276:Contraceptives, Oral; D016912:Levonorgestrel