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Analysis of pregnancy-associated major basic protein levels throughout gestation
J M Wagner1, K Bartemes, K K Vernof
1Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, MN 55905.
Placenta
|November 1, 1993
Summary
Maternal serum levels of myelin basic protein (MBP) increase exponentially early in pregnancy. While a third-trimester rise in MBP was observed in most women, it did not reliably predict the onset of labor.
Area of Science:
- Reproductive biology
- Maternal-fetal medicine
- Biochemistry
Background:
- Previous research indicated that myelin basic protein (MBP) levels rise before labor.
- These findings suggested the potential of phosphorylated MBP (pMBP) levels as a predictor of labor onset.
Purpose of the Study:
- To investigate the common pattern of pMBP levels throughout gestation in pregnant women.
- To determine if a late third-trimester rise in pMBP predicts the onset of labor.
- To analyze the association of pMBP levels with placental weight, multiple gestation, and parity.
Main Methods:
- Serum pMBP levels were measured in 112 pregnant women throughout gestation.
- Statistical analysis was performed to correlate pMBP levels with labor onset and other pregnancy parameters.
Main Results:
- An exponential increase in pMBP levels was observed early in gestation (weeks 5-21) in all participants.
- A rise of ≥25% above baseline in pMBP levels during the third trimester was noted in 79% of women.
- pMBP levels showed associations with placental weight, multiple gestation, and parity.
- pMBP levels could not be used to create a precise model for labor prediction.
Conclusions:
- While pMBP exhibits a distinct pattern during pregnancy, its role remains unclear.
- Current data suggest pMBP is not a precise predictor of labor onset.
- Further research is needed to elucidate the function of pMBP in pregnancy.