AI Article Synopsis
- - The study aimed to assess how vanishing twin (VT) affects maternal serum marker levels and nuchal translucency (NT) during pregnancy.
- - Conducted as a secondary analysis of a larger study involving 6,793 pregnant women, the research found that women in the VT group had higher levels of alpha-fetoprotein (AFP) and inhibin A compared to those with normal singleton pregnancies.
- - The findings suggest that VT should be factored into risk assessments during second-trimester serum screening tests due to its association with abnormal AFP levels.
Article Abstract
Background: The purpose of this study was to evaluate the effect of vanishing twin (VT) on maternal serum marker concentrations and nuchal translucency (NT).
Methods: This is a secondary analysis of a multicenter prospective cohort study in 12 institutions. Serum concentrations of pregnancy-associated plasma protein-A in the first trimester and alpha-fetoprotein (AFP), total human chorionic gonadotrophin, unconjugated estriol, and inhibin A in the second trimester were measured, and NT was measured between 10 and 14 weeks of gestation.
Results: Among 6,793 pregnant women, 5,381 women were measured for serum markers in the first or second trimester, including 65 cases in the VT group and 5,316 cases in the normal singleton group. The cases in the VT group had a higher median multiple of the median value of AFP and inhibin A than the normal singleton group. The values of other serum markers and NT were not different between the two groups. After the permutation test with adjustment, AFP and inhibin A remained significant differences. The frequency of abnormally increased AFP was also higher in the VT group than in the normal singleton group.
Conclusion: VT can be considered as an adjustment factor for risk assessment in the second-trimester serum screening test.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10519777 | PMC |
| http://dx.doi.org/10.3346/jkms.2023.38.e300 | DOI Listing |
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