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Database - Alliance francophone pour l'accouchement respecté (AFAR)
Created on : 25/10/2005
Modified on : 2/12/2007

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Author(s) :

Levy A, Fraser D, Katz M, Mazor M, Sheiner E.

Bibliographical entry (without author) :

Maternal anemia during pregnancy is an independent risk factor for low birthweight and preterm delivery.{Israel}.
Eur J Obstet Gynecol Reprod Biol. 2005 Oct 1;122(2):182-6.

Year of publication :


Résumé (français) :

Abstract (English):

OBJECTIVE:: The present study was designed to investigate the outcome of pregnancy and delivery in patients with anemia.

METHODS:: A retrospective population-based study comparing all singleton pregnancies of patients with and without anemia was performed. Deliveries occurred during the years 1988-2002 in the Soroka University Medical Center. Maternal anemia was defined as hemoglobin concentration lower than 10g/dl during pregnancy. Patients with hemoglobinopathies such as thalassemia were excluded from the analysis. Multiple logistic regression models were performed to control for confounders.

RESULTS:: During the study period there were 153,396 deliveries, of which 13,204 (8.6%) occurred in patients with anemia. In a multivariable analysis, the following conditions were significantly associated with maternal anemia: placental abruption, placenta previa, labor induction, previous cesarean section (CS), non-vertex presentation and Bedouin ethnicity. Higher rates of preterm deliveries (<37 weeks gestation) and low birthweight (<2500g) were found among patients with anemia as compared to the non-anemic women (10.7% versus 9.0%, p<0.001 and 10.5% versus 9.4%, p<0.001; respectively). Higher rates of CS were found among anemic women (20.4% versus 10.3%; p<0.001). The significant association between anemia and low birthweight persisted after adjusting for gender, ethnicity and gestational age, using a multivariable analysis (OR=1.1; 95% CI 1.0-1.2, p=0.02). Two multivariable logistic regression models, with preterm delivery (<37 weeks gestation) and low birthweight (<2500g) as the outcome variables, were constructed in order to control for possible confounders such as ethnicity, maternal age, placental problems, mode of delivery and non-vertex presentation. Maternal anemia was an independent risk factor for both, preterm delivery (OR=1.2; 95% CI 1.1-1.2, p<0.001) and low birthweight (OR=1.1; 95% CI 1.1-1.2, p=0.001).

CONCLUSION:: Maternal anemia influences birthweight and preterm delivery, but in our population, is not associated with adverse perinatal outcome.

Sumário (português):


Comments :

Argument (français) :

De quoi méditer, puisque ce qui est le plus signifiant dans l'étude c'est la multiplication par 2 du taux de césarienne chez les femmes enceintes considérées comme anémiques ... Augmentation des prématurés et faibles poids de naissance tout juste notable (1/10 de plus).

Argument (English):

Argumento (português):

Keywords :

c-section/caesarean ; induction of labor ; screening ; low birth weight ; evidence-based medicine/midwifery ; premature baby ; maternal age ; post-term pregnancy

Author of this record :

Cécile_Loup — 25/10/2005

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