Prolonged calving intervals in the Nili-Ravi buffalo

breeding seasons breeds (animals) buffle d'eau ciclo estral cycle oestral fertilidad fertilite fertility induced ovulation oestrous cycle ovulation induite parto parturition performance de reproduction progesterona progesterone puerperio puerperium race (animal) razas (animales) reproductive performance reproductividad saison d'accouplement water buffaloes