title: Factors associated with preterm labor in Hormozgan province in 2013.
abstract: BACKGROUND
  Preterm labor is the main cause of infants' death, and the main reason for undesirable consequences of pregnancy which still occur in some births, despite all of the interventions in this regard. The aim of this study was to evaluate every preterm birth and determine its maternal risk factors in Hormozgan province in 2013.
  
  
  METHODS
  This case-control study was conducted in 2013 on the health and hospital records of 735 pregnant mothers with preterm labor (20-37 weeks) which were located in Bandar Abbas in southeast Iran. The sampling method would be multi-stage cluster sampling. The data collecting tool was a valid questionnaire by the Iran Ministry of Health and Medical Education, which included 5 components (demographic information, checking the current pregnancy of the mother, the maternal factors related to preterm labor in the previous pregnancy, evaluating the fetal factors associated with preterm labor in the current pregnancy and other additional information related to the factors associated with prematurity). Data were analyzed using descriptive statistics, regression and Chi-square tests.
  
  
  RESULTS
  The prevalence of preterm labor in Hormozgan province in 2013 was 5.5%. In our study and among the effective factors on preterm labor, revealed genital-urinary tract infections during pregnancy were (35.8%), PROM (30.3%), history of abortion (19.9%) and unplanned pregnancy (18.1%) in between pregnant women with preterm labor. Our study showed that most mothers had delivered in 33 to 37 weeks among the mothers who had preterm labor in 2013 (75%) and the statistic of very preterm labor (less than 32 weeks) in Hormozgan was 5%.
  
  
  CONCLUSIONS
  Identification of the prevalence and associated factors with preterm labor can reduce the mortality rate and infants' complications of it in addition to help find a way to prevent this problem.
authors: Ph.D. of Reproductive Health, Mother and Child Welfare Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
authors: Nasibeh
authors: N
authors: Roozbeh
authors: B.Sc. of Midwifery, Deputy of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
authors: Soheila
authors: S
authors: Moradi
authors: B.Sc. of Midwifery, Deputy of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
authors: Shirin
authors: S
authors: Soltani
authors: B.Sc. of Family Health, Deputy of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
authors: Fatemeh
authors: F
authors: Zolfizadeh
authors: B.Sc. of Family Health, Deputy of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
authors: Mehdi Tadris
authors: MT
authors: Hasani
authors: M.Sc. of Midwifery, Instructor of Obstetrics Department, Mother and Child Welfare Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
authors: Asiyeh Pormehr
authors: AP
authors: Yabandeh
keywords: Infants; Mothers; Preterm labor