Abstract
Objective: To examine the relation of serum folate, vitamin B12 and ferritin levels to 1st and 2nd trimester serum screening markers. Methods: Fetal crown-rump length (CRL), nuchal translucency (NT), and first and second trimester serum screening tests of 228 pregnant women were obtained. In all cases, serum vitamin B12, folic acid and ferritin levels were analyzed during the 11–14 week period. Levels below <15 µg/L, 3 ng/mL and 211 pg/mL were accepted as nutrient deficiency for serum ferritin, folic acid and vitamin B12, respectively. Results of serum screening markers of women below and above these values were compared with each other. Results: Comparison of groups with ferritin levels <15 and >15 µg/L for 1st and 2nd trimester serum screening parameters revealed significant differences between groups in terms of pregnancy associated plasma protein-A (PAPP-A), free β-human chorionic gonadotropin (fb-hCG), AFP and hCG. Comparison of women with low versus normal B12 levels revealed significant differences in terms of NT, PAPP-A and fb-hCG. Conclusion: Although sufficient, number of cases is limited in this study so results cannot be generalized to all population. It could be advised that in addition to folic acid supplementation, deficiencies of ferritin and B12 must be corrected in patients considering pregnancy or early 1st trimester pregnant women to obtain more accurate serum screening results.
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