MBL2 and thyroid gland disorder: In contrast to our previous findings in non-pregnant middle-aged population [18], the influence of thyroid disease on MBL levels in pregnancy was present in its most subtle form: even the isolated TPOAb-positivity in euthyroid pregnant women associated with only a minor TSH shift within the reference range led to a significant decrease in serum MBL levels, as compared to TPOAb-negative, euthyroid pregnant women.