On Doppler the most ominous sign indicating fetal compromise is :
Fetuses with absent end diastolic volume have a poorer outcome than those with only reduction in EDF with majority being delivered by Caesarean section.The morbidity from necrotizing enterocolitis and cerebral haemorrhage is also higher. refer pgno:513 sheila textbook of obstetrics 2 nd edition.
pulsatility index in umbilical aery
increased resistance in uterine aery
increased PSV in middle cerebral aery
Absent diastolic flow in umbilical aery
Diagnosis in obstetrics