Study finds OC users protected against onset of chlamydial PID.
D000569:Americas; D002689:Chlamydia; D003141:Communicable Diseases; D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral; D019049:Developed Countries; D003906:Developing Countries; D004194:Disease; D005193:Family Planning Services; D006069:Gonorrhea; D007239:Infections; D009656:North America; D000292:Pelvic Inflammatory Disease; D011154:Population Characteristics; D012106:Research; D012749:Sexually Transmitted Diseases; D014481:United States; D014861:Washington
D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral
Adnexitis; Americas; Bacterial And Fungal Diseases; Chlamydia; Communicable Diseases; Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Methods--beneficial effects; Developed Countries; Developing Countries; Diseases; Family Planning; Gonorrhea; Infections; North America; Northern America; Oral Contraceptives--beneficial effects; Pelvic Infections; Pelvic Inflammatory Disease; Population At Risk; Reproductive Tract Infections; Research Methodology; Sexually Transmitted Diseases; United States; Washington