Skip to Main content Skip to Navigation
Journal articles

Pre-conception serum ferritin concentrations are associated with metal concentrations in blood during pregnancy: A cohort study in Benin

Abstract : Background Iron deficiency is a common nutritional deficiency that impacts maternal health and fetal development and is also associated with increased uptake of toxic metals. Women in sub-Saharan Africa are highly exposed to both iron deficiency and metals in the environment. As research on the developmental origins of health and disease increasingly shows impacts of pre-conception maternal health on pregnancy and fetal health, these environmental exposures are of concern. Objectives This study investigated the association between iron status pre-pregnancy and blood metal concentrations in the first trimester of pregnancy with potential implications for iron supplementation. Methods Pre-conception and first trimester blood samples taken from 262 Beninese women were tested for serum ferritin, inflammation markers, manganese (Mn), cadmium (Cd), lead (Pb), copper, zinc, selenium, mercury and arsenic. Associations between serum ferritin adjusted for inflammation and metal concentrations were analyzed using multivariate linear regression. Results Women with iron deficiency before conception (13%) were more likely to remain iron deficient in the first trimester (4%) (adjusted OR = 41.2, 95%CI 6.2; 275.0) even within the context of routine iron supplementation during pregnancy. Lower pre-pregnancy serum ferritin concentrations were significantly related to higher concentrations of Mn, Cd and Pb in the first trimester. Every 1% increase in serum ferritin concentration was associated with a 0.13% decrease in Mn (adjusted β = −0.13, 95%CI -0.18; −0.07), a 0.22% decrease in Cd (adjusted β = −0.22, 95%CI -0.28; −0.15) and a 0.06% decrease in Pb concentration (adjusted β = −0.06, 95%CI -0.12; −0.006). Discussion These results suggest that increasing iron stores prior to pregnancy may prevent excessive uptake of toxic concentrations of the metals Mn, Cd and Pb and argue in favour of testing the effects of iron supplementation prior to pregnancy on metal concentrations.
Document type :
Journal articles
Complete list of metadata

https://hal.ehesp.fr/hal-03312406
Contributor : Scd Ehesp <>
Submitted on : Monday, August 2, 2021 - 1:03:12 PM
Last modification on : Friday, August 27, 2021 - 3:49:19 PM

Identifiers

Citation

Sarah Davies, Valérie Briand, Manfred Accrombess, Nadine Fievet, Barbara Le Bot, et al.. Pre-conception serum ferritin concentrations are associated with metal concentrations in blood during pregnancy: A cohort study in Benin. Environmental Research, Elsevier, 2021, 202, ⟨10.1016/j.envres.2021.111629⟩. ⟨hal-03312406⟩

Share

Metrics

Record views

44