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Ugeskr Laeger. 1995 Nov 20;157(47):6571-5.

[Iron status markers in pregnant women. No clinically significant connection between the values during the second trimester, later in pregnancy and after delivery].

[Article in Danish]

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Medicinsk-lungemedicinsk afdeling Y, Amtssygehuset i Gentofte.


The aim of this randomized, double blind, placebo controlled parallel study was to evaluate whether iron status markers in pregnant women, measured early in the second trimester, could be used to predict levels later in pregnancy, and post partum. One hundred and twenty healthy pregnant women between 14 and 18 weeks of gestation were included. Sixty-three women were allocated to treatment with tablets containing 66 mg ferrous iron (as fumarate) daily, and 57 women to treatment with placebo. Haemoglobin, serum transferrin saturation, and serum ferritin were measured every fourth week during gestation, prior to delivery, one week and eight weeks post partum. Correlation matrices during pregnancy and post partum were calculated for each iron status marker, both in iron and placebo treated women. Haemoglobin, transferrin saturation and serum ferritin values at inclusion displayed steadily declining correlation coefficients with values obtained later in pregnancy. There were no clinically relevant correlations to values obtained eight weeks or less prior to delivery, or post partum. Serum ferritin values at inclusion could not be used to predict values later in pregnancy or post partum. Haemoglobin, transferrin saturation and serum ferritin values measured in the beginning of the second trimester appear unsuitable as guidelines for an individual iron prophylaxis during the remaining period of pregnancy.

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