Objective: To compare short antibiotic prophylaxis versus prolonged antibiotic regime in terms of morbidity control of infection in patients undergoing elective caesarean section. Study Design and Settings: It was a experimental study done in Gynae/Obs unit I Holy Family Hospital, Rawalpindi over a period of one year. Patients and Methods: Total of 200 patients selected randomly were admitted in antenatal ward for elective caesarean section. All these booked patients with age less then 40 years, gestational age of > 38 weeks, Hb >10g/dl, with no signs of genitourinary or respiratory tract infection were included in the study. These patients were divided in two groups with 100 patients in each group. In group I, short antibiotic prophylaxis in form of three doses of injectable antibiotic was given. In group II prolonged antibiotic regime was given as 5 days course. Augmentin was chosen as it has proven efficacy and good coverage for microorganisms of urogential tract and skin. Injection Augmentin was given in dose of 1.2g (1g Amoxycillin + 200mg clavulanic acid) I/V x BD. All operation were performed by transverse lower segment caesarean section by registrars and consultants. Anaesthesia used was mostly spinal and more than 80% of the patients were having body mass index of