Strengths and Limitations-
Prospective nature of the study and simplified subjective approach of
AoI waveform analysis rather than objective assessment of waveform were
the merits of our study.
This study has limitations like small sample size and prematurity .
Delivery <34WOG had sensitivity (70%) ,Specificity ( 92%)
and high positive likelihood ratio of 8.75 for prediction of adverse
perinatal outcome, supporting the important role prematurity in the
prediction of perinatal outcome .
And also retrograde flow in the aortic isthmus was not used as trigger
for delivery .