Use of long-acting contraceptives.
D003271:Contraceptive Agents, Female / Q000009:adverse effects*; D003280:Contraceptives, Oral, Synthetic / Q000009:adverse effects*; D004343:Drug Implants; D005260:Female; D006261:Headache / Q000139:chemically induced; D006801:Humans; D016912:Levonorgestrel / Q000009:adverse effects*
D003271:Contraceptive Agents, Female; D003280:Contraceptives, Oral, Synthetic; D004343:Drug Implants; D016912:Levonorgestrel