A detailed pre-anaesthetic check up and all routine
investigations as guided by age was carried out in all the
parturients. The inclusion criteria were: ASA grade І, age
≥ 18 years, vertex presentation of fetus, established labour
(effective painful uterine contractions, good cervical
effacement and cervical dilatation ≥ 3cm), primigravida
with single live fetus and uncomplicated pregnancy.