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Amniotic fluid beta-2 microglobulin in normal and complicated pregnancies.
Acta Physiologica Hungarica
|January 1, 1985
Summary
Beta-2 microglobulin levels in amniotic fluid peak in the second trimester and decrease by term, indicating fetal renal maturation. Elevated levels in complicated pregnancies may signal delayed fetal kidney development.
Area of Science:
- Biochemistry
- Obstetrics
- Perinatology
Background:
- Beta-2 microglobulin (B2M) is a protein found on cell surfaces.
- Its concentration in amniotic fluid changes throughout pregnancy.
Purpose of the Study:
- To analyze B2M concentrations in amniotic fluid during normal and complicated pregnancies.
- To assess the potential of B2M as a marker for fetal age and renal maturation.
Main Methods:
- Enzyme-Linked Immunosorbent Assay (ELISA) was used to measure B2M.
- Amniotic fluid samples were collected from women at various gestational stages (32-42 weeks).
Main Results:
- Amniotic fluid B2M increased significantly until 20-24 weeks, peaking in the second trimester.
- B2M levels decreased by term, correlating with fetal renal tubular maturation.
- Elevated B2M was observed in pregnancies with diabetes, toxemia, and placental insufficiency.
Conclusions:
- Amniotic fluid B2M levels reflect fetal renal maturation and may indicate fetal age.
- Elevated B2M in complicated pregnancies suggests potential delays in fetal kidney development.