title: Can anemia predict perinatal outcomes in different stages of pregnancy?
abstract: OBJECTIVE
  To investigate the effect of anemia on perinatal outcomes as preterm delivery (PTD) and low birth weight (LBW) in the different stages of pregnancy.
  
  
  METHODS
  Medical records of 39,587 Turkish pregnant women who delivered between January 2011 and September 2014 were reviewed. Anemia during pregnancy was defined as hemoglobin (Hb)< 11 g/dl, low birth weight was defined as birth weight <2500 gr and PTD was defined as <37 weeks. The pregnant women were divided into three groups (Hb<10 gr/dl, Hb 10-11 gr/dl, Hb>11 gr/dl). Perinatal outcomes were compared between these anemic and non-anemic groups.
  
  
  RESULTS
  The anemia prevalence in our study was 25.1%. In the first and second trimester of Hb<10g/dl group LBW ratio was significantly higher (respectively 13.5%, 9.8%, p=0.03; 22.7%, 14.7%, p=0.01). In the second and third trimesters of Hb<10 g/dl group PTD ratio was significantly higher (respectively 29.1%, 19%, p=0.00; 17.7%, 15.4% p=0.02). In the first trimester Hb<10 g/dl group cesarean section rate was significantly higher (respectively 65.2%, 57.6%, p = 0.01).
  
  
  CONCLUSIONS
  LBW infants and preterm birth rate was higher in Hb <10 gr/dl group than non-anemic in the first, second and third trimester. Hb <10 gr/dl group had higher cesarean rate in first trimester. The mean birth weight was significantly lower in anemic pregnant women in the second trimester. Preterm birth and cesarean section rate, in the group of anemic throughout pregnancy was higher than those of non-anemic in the whole pregnancy period.
authors.affiliation: Tayfun Vural, Department of Obstetrics and Gynecology, Izmir Tepecik Education and Research Hospital, Izmir, Turkey.
authors.forename: Tayfun
authors.initials: T
authors.lastname: Vural
authors.affiliation: Emrah Toz, Department of Obstetrics and Gynecology, Izmir Tepecik Education and Research Hospital, Izmir, Turkey.
authors.forename: Emrah
authors.initials: E
authors.lastname: Toz
authors.affiliation: Aykut Ozcan, Department of Obstetrics and Gynecology, Izmir Tepecik Education and Research Hospital, Izmir, Turkey.
authors.forename: Aykut
authors.initials: A
authors.lastname: Ozcan
authors.affiliation: Alper Biler, Department of Obstetrics and Gynecology, Izmir Tepecik Education and Research Hospital, Izmir, Turkey.
authors.forename: Alper
authors.initials: A
authors.lastname: Biler
authors.affiliation: Alper Ileri, Department of Obstetrics and Gynecology, Izmir Buca Maternity and Children Hospital, Izmir, Turkey.
authors.forename: Alper
authors.initials: A
authors.lastname: Ileri
authors.affiliation: Abdurrahman Hamdi Inan, Department of Obstetrics and Gynecology, Izmir Tepecik Education and Research Hospital, Izmir, Turkey.
authors.forename: Abdurrahman Hamdi
authors.initials: AH
authors.lastname: Inan
keywords: Anemia; Low birth weight; Preterm delivery