|The Relationship Between The Incidence of Second and Third Trimester Hemoglobin and The Incidence of Preterm Birth and Birth Weight|
|Nastaran Safavi Arbedili1|
|1Department of Midwifery, Ardabil Branch. Islamic Azad University, Ardabil, Iran|
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Keywords : ROC surface, Second and third trimester hemoglobin, Preterm delivery, LBW
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Objectives: Changes of maternal hemoglobin during pregnancy has effects on preterm delivery and LBW( low birth weight). The aim of this study was to investigate the relation between the second and third trimester hemoglobin levels and the incidence of LBW and preterm delivery.
Materials and Methods: Six hundred patients at Milad Hospital in 2011 evaluated in this study. Second and third trimester hemoglobin levels were measured. The relation between maternal hemoglobin level and the incidence rate of LBW and preterm delivery evaluated. In addition, the relation between second and third trimester hemoglobin level and education, job, history of abortion, and the use of calcium, folic acid, iron and multivitamin pills was evaluated.
Results: The results indicated in patients with preterm delivery and LBW, the second trimester maternal hemoglobin levels was high. The relative risk of preterm delivery in the second trimester of pregnancy was 1.89 times higher in the high hemoglobin group than the normal hemoglobin group (CI = 1.15-3.01) and in the third trimester was 1.16 times higher. In addition, the relative risk of LBW in the high hemoglobin group was 2.7 times of normal one (CI = 1.15-5.01) and in the third trimester was 1.03 higher.
Conclusion: The high hemoglobin especially in the second trimester is associated with higher risk of subsequent preterm delivery and LBW. Hence, it is recommended that women with high hemoglobin in their second trimester should be should be checkup timely to reduce the undesirable effects of pregnancy.
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