Impact of Body Mass Index on Haematological parameters at booking in Ilorin, Nigeria.


Background: Pregnancy is associated with physiological changes that affect almost all of the systems in the body, including weight gain; these changes accommodate the demands of the feto-placental unit. Therefore, hematological parameters in pregnancy may not be comparable with those of non-pregnant women. Methodology: A total of 500 pregnant women were consecutively recruited at booking, and 465 met the inclusion criteria. Their blood samples were analyzed for some blood indices, which were compared with their body mass indices and sociodemographic characteristics. Results: The mean levels of Mean Corpuscular Volume(MCV) and Mean Corpuscular Hemoglobin Concentration(MCHC) were 82.2 fl ± 8.4 and 34.0 g/dl ± 1.9, respectively, which were within the normal reference values but close to the lower limits. The hemoglobin concentration was low (10.5 g/dl), whereas the erythrocyte sedimentation rate was high (34.1 mm/hr). Hematological parameters were compared by trimesters. MCV and Mean Corpuscular Hemoglobin(MCH) increased across the trimesters, with P values of 0.0007 and 0.011, respectively (P< 0.05). PCV was also inversely proportional to the gestational age (P0.026). There was no statistically significant difference when BMI and hematological parameters were compared (P>0.05), although RBC and PCV values increased as the maternal weight increased, suggesting a probable positive correlation between the red cell count and concentration and body mass index in pregnancy. Conclusion: This study confirmed the hemodilutional effect of pregnancy and suggests a relationship between BMI, RBC and PCV in pregnancy. Body weight may increase the red cell parameters in pregnancy.



Body Mass Index, Haematological parameters, maternal weight, Pregnancy


Adesina KT, Aderibigbe AS, Olarinoye AO, Balogun OR, Fadeyi A, Babatunde AS, Abdulkareem MA Ezeoke GG. (2013): Impact of Body Mass Index on Haematological parameters at booking in Ilorin, Nigeria. Centre point Journal 19(2): 153-162.