Objective: To seek the impact of fasting on the outcome of labour. Methods: This was a cross-sectional study carried out in consenting parturients who had a singleton pregnancy at term, and who had been fasting for at least 10hours. The fasting was confirmed by appositive ketonuria test. The impact of fasting (attributable risk) was calculated using the Open Epi software. Results: No case of Mendelson syndrome was observed, vomiting in the non fasting parturients was not abundant, (4% of cases RR=0.3); fasting exposes the women 3.75 times more to risk of dynamic dystocia (40% of cases) and 3.5 times more to risk o f acute fe tal distress (18.6% of ca ses). Instrumental vaginal delivery was not significantly more frequent in fasting women (RR=1.5 ; p=0.12) and spontaneous vaginal delivery had a protective effect (RR=0.66 ; p=0.001). On the contrary, cesarean deliveries were significantly more frequent in these parturients (RR=3.7 ; p =0.0006). The impact of fasting on parturients is as follows: for every 100 fasting parturients, 73.3% may present with dynamic dystocia, 71.4% with acute foetal distress and 73.3% stand the risk of having a cesarean delivery. Conclusion: Fasting is detrimental to the outcome of labour and delivery, it is advisable to encourage feeding in parturients.