1. In: Behrman RE, Butler AS, editors. Preterm Birth: Causes, Consequences, and Prevention. The National Academies Collection: Reports funded by National Institutes of Health. Washington (DC)2007.
2. 2016 Premature Birth Report Card. http://www.marchofdimes.org/materials/premature-birth-report-card-united-states.pdf2016.
3. Preterm labor: one syndrome, many causes;R Romero;Science,2014
4. Bacterial vaginosis and spontaneous preterm birth;G Brabant;Journal de gynecologie, obstetrique et biologie de la reproduction,2016
5. Vaginal douching, bacterial vaginosis, and spontaneous preterm birth;ML Luong;Journal of obstetrics and gynaecology Canada: JOGC = Journal d’obstetrique et gynecologie du Canada: JOGC,2010