title: The effect of maternal hemoglobin concentration on fetal birth weight according to trimesters.
abstract: OBJECTIVE
  To investigate the relationship between fetal birth weight and maternal hemoglobin concentrations in different trimesters.
  
  
  METHODS
  This prospective cross-sectional study comprised 329 women, monitored and delivered between January 2013 and January 2014 in our clinic. Hemoglobin concentrations in all trimesters and all birth weights of the newborns were recorded. Comparisons and correlations were made of the maternal hemoglobin concentrations and birth weights in each trimester.
  
  
  RESULTS
  A positive correlation was determined between fetal weight and increased first trimester maternal hemoglobin concentration (p: 0.025). No correlation was found between fetal weights and second and third trimester hemoglobin concentrations (p = 0.287, p = 0.298, respectively). When the effect of independent factors on fetal weight was investigated, it was determined that birth week and first trimester hemoglobin levels were the factors of most influence.
  
  
  CONCLUSIONS
  Low hemoglobin concentrations in the first trimester of gestation seem to be associated with low fetal birth weights. Anemia can directly cause poor in utero fetal growth due to inadequate oxygen flow to the placental tissue or it can be an indirect indicator of maternal nutrition deficiency. In both circumstances, this study reveals that treatment of anemia before and in the early stages of pregnancy is directly correlated with better fetal outcomes.
authors.affiliation: a Department of Obstetrics and Gynecology , Kahramanmaras Sutcu Imam University, School of Medicine , Kahramanmaraş , Turkey .
authors.forename: Murat
authors.initials: M
authors.lastname: Bakacak
authors.affiliation: a Department of Obstetrics and Gynecology , Kahramanmaras Sutcu Imam University, School of Medicine , Kahramanmaraş , Turkey .
authors.forename: Fazıl
authors.initials: F
authors.lastname: Avci
authors.affiliation: a Department of Obstetrics and Gynecology , Kahramanmaras Sutcu Imam University, School of Medicine , Kahramanmaraş , Turkey .
authors.forename: Onder
authors.initials: O
authors.lastname: Ercan
authors.affiliation: a Department of Obstetrics and Gynecology , Kahramanmaras Sutcu Imam University, School of Medicine , Kahramanmaraş , Turkey .
authors.forename: Bülent
authors.initials: B
authors.lastname: Köstü
authors.affiliation: a Department of Obstetrics and Gynecology , Kahramanmaras Sutcu Imam University, School of Medicine , Kahramanmaraş , Turkey .
authors.forename: Salih
authors.initials: S
authors.lastname: Serin
authors.affiliation: a Department of Obstetrics and Gynecology , Kahramanmaras Sutcu Imam University, School of Medicine , Kahramanmaraş , Turkey .
authors.forename: Gürkan
authors.initials: G
authors.lastname: Kiran
authors.affiliation: b Department of Obstetrics and Gynecology , Sakarya University Research and Education Hospital , Sakarya , Turkey , and.
authors.forename: Mehmet Sühha
authors.initials: MS
authors.lastname: Bostanci
authors.affiliation: c Department of Obstetrics and Gynecology , Private Caka Vatan Hospital , Kahramanmaraş , Turkey.
authors.forename: Zeyneb
authors.initials: Z
authors.lastname: Bakacak
mesh_terms: D000293:Adolescent; D000328:Adult; D000740:Anemia / Q000150:complications; D001724:Birth Weight; D003430:Cross-Sectional Studies; D005260:Female; D047109:Fetal Development; D020567:Fetal Weight; D005865:Gestational Age; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D007231:Infant, Newborn; D008875:Middle Aged; D011247:Pregnancy; D011250:Pregnancy Complications, Hematologic; D011261:Pregnancy Trimester, First; D011446:Prospective Studies
chemical_list: D006454:Hemoglobins
keywords: Anemia; birth weight; trimester