Collection: 01-internacional Database: MEDLINE Main subject: Neonatal Nursing / Obstetric Labor, Premature / Obstetric Nursing Type of study: Etiology_studies Limits: Female / Humans / Newborn / Pregnancy Country/Region as subject: America do norte Language: En Journal: J Obstet Gynecol Neonatal Nurs Journal subject: ENFERMAGEM / GINECOLOGIA / OBSTETRICIA / PERINATOLOGIA Year: 2003 Document type: Article Country of publication: