title: Coitus and premature labour.
mesh_terms: D003075:Coitus; D005260:Female; D006801:Humans; D007752:Obstetric Labor, Premature / Q000209:etiology*; D009948:Orgasm; D011247:Pregnancy; D011453:Prostaglandins / Q000494:pharmacology
chemical_list: D011453:Prostaglandins