Abstract
Purpose
This study aimed to investigate the association between simple markers in fetal abdominal plane, intra-abdominal umbilical venous diameter (DIUV) and abdominal circumference (AC) discordance at 15–20 weeks’ gestation, and adverse pregnancy outcomes in monochorionic diamniotic (MCDA) twins.
Methods
We performed a retrospective analysis of MCDA twins with two live fetuses examined at 15–20 weeks from Jun 2020 to Dec 2021 at Beijing Obstetrics and Gynecology Hospital. Measurement of fetal AC and DIUV was performed according to standard protocols. Twin pregnancies with major fetal structural anomalies, chromosomal abnormalities, miscarriage, and twin reversed arterial perfusion sequence were excluded. DIUV and AC discordance in MCDA twins with an adverse pregnancy outcome was compared with a normal pregnancy outcome. Furthermore, the performance of DIUV and AC discordance in predicting adverse pregnancy outcomes in MCDA twins was assessed.
Results
A total of 105 women with MCDA twin pregnancies were enrolled, contributing 179 visits. Adverse pregnancy outcomes occurred in 33.3% (35/105) of cases in our study. The intra-observer and inter-observer intraclass correlation coefficient (ICC) of both AC and DIUV were very good or excellent. There was no statistical difference in AC and DIUV discordance (%) between 15–16, 17–18, and 19–20 weeks (χ2 = 3.928, P = 0.140; χ2 = 2.840, P = 0.242). Both AC and DIUV discordance were greater in twins with adverse pregnancy outcomes than that in twins with normal pregnancy outcome at each pregnancy periods. Both AC discordance (OR 1.2, 95% CI 1.1–1.3) and DIUV discordance (OR 1.2, 95% CI 1.1–1.2) were associated with adverse pregnancy outcomes. The AUC for predicting adverse pregnancy outcomes by AC discordance was 0.75 (95% CI 0.68–0.83), with a sensitivity of 58.7% (95% CI 51.9–64.5) and a specificity of 86.2% (95% CI 81.7–88.4). The AUC for predicting adverse pregnancy outcomes by DIUV was 0.78 (95% CI 0.70–0.86), with sensitivity and specificity of 65.1% (95% CI 58.1–70.3) and 86.2% (95% CI 81.7–88.4), respectively.
Conclusions
The AC discordance and DIUV discordance could predict adverse pregnancy outcomes in MCDA twins. When these simple markers occurred, intensive surveillance was recommended.
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Abbreviations
- MCDA:
-
Monochorionic diamniotic
- TTTS:
-
Twin–twin transfusion syndrome
- sFGR:
-
Selective fetal growth restriction
- CRL:
-
Crown–rump length
- NT:
-
Nuchal translucency
- AC:
-
Abdominal circumference
- EFW:
-
Estimated fetal weight
- DIUV :
-
Intra-abdominal umbilical venous diameter
- TRAP:
-
Twin reversed arterial perfusion
- TAPS:
-
Twin anemia polycythemia sequence
- ISUOG:
-
International Society of Ultrasound in Obstetrics and Gynecology
- ICC:
-
Intraclass correlation coefficient
- OR:
-
Odds ratio
- AUC:
-
Area under the receiving operator characteristic curve
- SFLP:
-
Selective fetoscopic laser photocoagulation
- IUV:
-
Intra-abdominal umbilical venous
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Acknowledgements
We would like to express our great appreciation to all our colleagues who referred pregnancy women to us and the enrolled MCDA twin pregnancy women who trusted us.
Funding
This work was supported by Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital ‘Excellent Youth’ Plan Special Funds (NO.YQRC201811), Beijing Hospitals Authority Youth Programme (QML20191403).
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XL: Manuscript writing, Project and protocol development, Data Collection, management and analysis; JH: Project development, Manuscript editing; JZ: Data Collection, Manuscript editing; QW: Corresponding author of this paper, Project and protocol development and supervising; HJ: Data collection, Antenatal care providing, Intrauterine treatment performed when needed.
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The authors assert that all procedures contributing to this study comply with the ethical standards of the relevant national guidelines on human experimentation and with the Helsinki Declaration of 1975, as revised in 2008. This study was approved by the Ethics Committees of the Beijing Obstetrics and Gynecology Hospital, Capital Medical University(2020-KY-028-01).
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Li, X., Han, J., Zhang, J. et al. Intra-abdominal umbilical venous diameter and abdominal circumference discordance at 15–20 weeks’ gestation: simple markers in transverse abdominal plane to predict adverse pregnancy outcomes in monochorionic diamniotic twins. Arch Gynecol Obstet 309, 1951–1958 (2024). https://doi.org/10.1007/s00404-023-07085-7
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DOI: https://doi.org/10.1007/s00404-023-07085-7