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Updated: Aug 16, 2026

Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
Published on: September 5, 2011
First-trimester risk assessment: twin gestations
1Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, and Center for Fetal Medicine and Women's Ultrasound, Los Angeles, CA 90048, USA. LPlatt8496@aol.com
Objective:
To determine the role of first-trimester screening in multiple gestations.
Materials And Methods:
A review of the literature revealed numerous studies in this area. However, most of the studies involved first-trimester singleton pregnancies.
Results:
The few studies that reviewed the experience with multiple gestations demonstrated feasibility of this technique. However, the detection rate for twin gestations was less than that of singleton gestations.
Conclusion:
Although the data support the value of screening twins with biochemistry and ultrasound in the first trimester, further study is necessary to determine the most sensitive method.
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