Study the Prevalence of Anestus in Relation to Some Threats in Heifer and Postpartum Cows

Abstract

The objectives of current study were to assess the prevalence and risk factors associated with postpartum anestrus in lactating dairy cows in Rajshahi, Bangladesh. A total of 160 postpartum cows of different breed, genotype and age were selected randomly from different dairy farms in studied area. Structured questionnaire was used to collect data from farm owner on prevalence and risk factors for postpartum anestrus. Observed heat within 60 days after parturition was considered as normal cyclic cows and others were considered as postpartum anestrus. The prevalence of postpartum anestrus was 54.42%. The study shows that older cows take relatively more time for ovarian resumption. The highest percentage (54.64%) of cows showed anestrus in crossbred cows that native in Rajshahi. When compared with genotype the highest percentage anestrus was observed 100.00 in Local x Jersey than 66.66% in Local x Sahiwal genotype to 53.07% in Local x Friesian and lowest was 50.00% in indigenous cattle. The age of cattle also relation to anestrus and the highest, lowest and average percentage of anestrus were showed 60.00%, 39.39% & 50.49% in < 4 year, > 6 years and 4 to < 6 years age group of cattle at Rajshahi area of Bangladesh.