Haram K, Augensen K, Elsayed S
Br J Obstet Gynaecol. 1983 Feb;90(2):139-45. doi: 10.1111/j.1471-0528.1983.tb08898.x.
The concentrations of acute-phase protein reactants, total protein, albumin and globulin fractions were measured throughout normal pregnancy in 27 women. alpha 1-Antitrypsin and caeruloplasmin concentrations increased gradually to reach their highest levels in the third trimester. Orosomucoid and haptoglobin showed similar patterns: higher levels in the first and third trimester with a decline around 24 weeks gestation. C-Reactive protein showed levels similar to those of non-pregnant healthy individuals (less than 5 mg/l) throughout pregnancy. alpha 1-, alpha 2- and beta-Globulin concentrations increased from the first trimester towards term. gamma-Globulin concentration changed little during gestation. The data obtained provide reference ranges for serum proteins in healthy pregnancy.