Blood proteins in different trimester of pregnancy

Background: Pregnancy is a physiological state accompanied by complex metabolic and biochemical adjustments essential for foetal development and maternal adaptation. One of the significant physiological alterations during pregnancy involves protein metabolism. Proteins, particularly serum albumin and globulin, play crucial roles in maintaining plasma volume, osmotic balance, and immune function. Studies have reported a decline in serum protein concentrations during pregnancy, which may be attributed to hemodilution, increased metabolic demands, and the transfer of amino acids to the fetus. Despite the importance of maintaining normal plasma protein levels for maternal and fetal health, data on trimester-wise protein variation in pregnant women remain limited.Objectives: The present study aimed to evaluate changes in serum total protein, albumin, and globulin levels during different trimesters of pregnancy and to compare them with those of non-pregnant women.Methodology: A follow-up study was conducted on 40 women aged 25-35 years, including 20 healthy non-pregnant controls and 20 pregnant women from the middle socioeconomic group. Blood samples were collected during the first (11-12 weeks), second (23-24 weeks), and third (35-36 weeks) trimesters. Total protein, albumin, and globulin levels were determined using standard spectrophotometric methods. Statistical analysis was performed to determine the significance of variations (p<0.001).Results: The mean total protein levels decreased progressively from the first to the third trimester (6.7 g%, 6.5 g%, and 6.2 g%, respectively) compared to controls (7.2 g%). Serum albumin levels also showed a marked decline (3.5 g%, 3.2 g%, and 2.8 g%), while globulin levels increased gradually (3.2 g%, 3.3 g%, and 3.4 g%). The changes were statistically significant (p<0.001).Conclusions: The study demonstrates a significant decline in serum total protein and albumin levels and a compensatory rise in globulin concentration during pregnancy. The findings suggest that hypoalbuminemia in pregnancy may result from increased fetal protein demands, hemodilution, and amino acid redistribution. Monitoring serum protein profiles during pregnancy is essential to ensure optimal maternal and fetal outcomes through appropriate nutritional interventions.