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Fig. 1.
Power Doppler images showing the spiral arteries in A. threatened abortion at 5 weeks; B. normal case at 4 weeks 5 days
Fig. 2.
Power Doppler waveform showing the spiral arteries flow pattern in A. case of threatened abortion at 5 weeks 2 days; B. normal case at 6 weeks
Fig. 3.
Gray scale TVS (Trans-vaginal sonography) image of a patient presenting with pain lower abdomen and vaginal bleeding at 5 wk 2 days. (Video clip shows the corresponding power Doppler tracing)
Fig. 4.
Graphical representation of age of the patients in the two groups
Fig. 5.
Distribution by gestational age
Fig. 6.
Scatter diagram depicting the distribution of PI values in the two groups
Fig. 7.
Scatter diagram depicting the distribution of RI values in the two groups
The mean values of age, BMI, and spiral artery Doppler indices (S/D ratio, RI and PI) in threatened abortion group (Group 1) and in control group comprising normal pregnant females with no complaints (Group 2)