A NOTE ON GESTATION LENGTH IN CROSSBRED CATTLE
G. Ajitkumar, D. Kasiviswanathan, A j ith Jacob George
Length of gestation is calculated as the interval from fertile service to parturition. The duration of gestation is genetically determined, although it can be modified by maternal, foetal and environmental factors (Hafez, 1993). Variations in gestation length are of importance in prevention of losses at parturition. A few days of intrauterine life for the fast growing foetus at the end of gestation results in a marked increase in size which may be sufficient to cause dystocia, particularly in primiparous animals (Laing, 1979).