The primary objective of this study is to determine the detection rate of two- or three-vessel umbilical cord at the time of nuchal translucency screening between 11 and 13 6/7 weeks gestation. Hypothesis: Detection rate of the number of vessels during first trimester will be as accurate as the detection of vessels during the second trimester.
Study Type
OBSERVATIONAL
Enrollment
123
Ultrasound using Doppler mode to detect blood flow in umbilical cord vasculature and determine the number of vessels present
Georgetown University Hospital, MedStar Health
Washington D.C., District of Columbia, United States
Washington Hospital Center, MedStar Health
Washington D.C., District of Columbia, United States
Detection of the number of vessels in the umbilical cord between 11 and 13 6/7 weeks.
Time frame: 11-13+6 weeks
Detection of the number of vessels in the umbilical cord between 18 and 23 6/7 weeks.
Time frame: 18 - 23 6/7 weeks
Sensitivity and specificity of transabdominal sonography at detecting vasculature of the cord between 11 and 13 6/7 weeks.
Time frame: 11-13+6 weeks gestational age
Sensitivity and specificity of transabdominal sonography at detecting vasculature of the cord during the second trimester.
Time frame: 18-24 weeks gestation
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