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KMID : 0191120230380380300
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Journal of Korean Medical Science
2023 Volume.38 No. 38 p.300 ~ p.300
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The Effect of Vanishing Twin on First- and Second-Trimester Maternal Serum Markers and Nuchal Translucency: A Multicenter Prospective Cohort Study
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Lee Se-Jin
Han You-Jung
Kim Min-Hyoung
Shim Jae-Yoon
Lee Mi-Young
Oh Soo-Young
Lee Joon-Ho
Kim Soo-Hyun
Cha Dong-Hyun
Cho Geum-Joon
Kwon Han-Sung
Kim Byoung-Jae
Park Mi-Hye
Cho Hee-Young
Ko Hyun-Sun
Bae Ji-Hye
Park Chan-Wook
Park Joong-Shin
Jun Jong-Kwan
Oh So-Hee
Lee Da-Rae
Ryu Hyun-Mee
Lee Seung-Mi
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Abstract
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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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KEYWORD
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Vanishing Twin, First- and Second-Trimester Maternal Serum Markers, PAPP-A, AFP, hCG, uE3
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