Over a 2-years period, data on 299 calvings (86 cows and 213 buffalo) were collected at the animal farm, Fac. Vet. Med. Suez Canal University, Ismailia - Egypt, to study the pattern of parturition in both species. In buffaloes, the calving pattern was relatively uniform during day and night compared to a higher incidence of daytime calvings in cattle. No significant influence was found for dam parity, calf birth weight or sex, weight of the placenta, season of the year on the timing of parturition. No association was detected between the calving time and incidence of dystocia, retained placenta, stillbirth and vaginal or uterine prolapse.