STDs may cause early deliveries.
D002690:Chlamydia Infections / Q000150:complications*; D005260:Female; D006801:Humans; D007752:Obstetric Labor, Premature / Q000209:etiology*; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious; D012749:Sexually Transmitted Diseases / Q000150:complications*; D016585:Vaginosis, Bacterial / Q000150:complications*