Saling, Erich Problems in prevention of preterm birth--regrettable contradictions. A special comment from the Founder of the Journal of Perinatal Medicine. [electronic resource] - Journal of perinatal medicine 05 2011 - 223-5 p. digital Publication Type: Editorial ISSN: 1619-3997 Standard No.: 10.1515/jpm.2011.033 doi Subjects--Topical Terms: FemaleHumansHydrogen-Ion ConcentrationPregnancyPregnancy Complications, InfectiousPremature Birth--economicsVagina--chemistryVaginosis, Bacterial--complications