Volatile anaesthetics including sevoflurane, desflurane, and isoflurane are often used during general anaesthesia for caesarean delivery. The cost effectiveness of isoflurane anaesthesia1 for caesarean delivery is widely used at many centres including the authors' centre, where general anaesthesia is commonly used for caesarean deliveries than did regional anaesthesia because of the refusal of many ladies for the later, especially in the light of evidence-based equivocal maternal or neonatal outcomes of both techniques. 2 However, isoflurane in similar to other inhalational anaesthetics have been shown a dose-dependent (from 0.5 to 2.35 minimum alveolar concentration (MAC)) induced myometrial relaxation in 25% of parturients with added risks of postpartum haemorrhage, 3-5 which may be mediated through the inhibition of the oxytocin-induced contraction,6 decrease in intracellular concentration of free calcium,7 inhibition of voltage-dependent calcium channels activity,8 and activation of adenosine triphosphate-sensitive potassium channels (K (ATP))9 of pregnant uterine smooth muscle.