Factors affecting anestrus in dairy cows at the rural areas in Bangladesh

Rural people of Bangladesh rear cow mainly for milk production. Milk production is related with parturition. There are many cow suffering from reproductive disturbance like anestrus that delayed conception and parturition. Therefore it is necessary to uncover the factors those are affecting anestrus in dairy cows. Present study was conducted to detect anestrous in dairy cow through rectal palpation of ovarian cyst and its therapeutic management at the rural areas of Bangladesh. In this investigation a cattle group of 46 indigenous and cross bred cows of first to fifth parturition with poor to moderate BCS and age between 2.5-7.5 years were examined. Data related to age, breed, parturition and insemination type were recorded in a registrar book. 35 cows were examined in upazila veterinary hospital and 11 cows in some small sized dairy farms of Bera upazila, Pabna, Bangladesh. The presumptive diagnosis of anestrous through rectal palpation and its therapeutic management was found effective. The ovaries of those cows were examined through rectal palpation where 58.70% were suspected as nutritional anoestrus whereas Follicular and luteal cysts were 19.57% and 13.04% respectively. Anestrous due to ovarian hypoplasia were diagnosed in 8.69% cows. Old cross bred cows (69.57%) ages between 5.5 to 7.5 years were more susceptible to anestrous than that of 2.5-5.5 years indigenous cows (30.43%). Cows affected from follicular cyst were treated with 2.5 ml intramuscular injection of GnRH hormone {Fertilon(R)} and cows affected from luteal cyst were treated with 5 ml intramuscular injection of PGF2a {Dinoprost(R)} and prognosis were recorded as 66.67% and 50% respectively. Ovarian hypoplasia and none recognized cases were first treated with Inj. Fertilon(R) 2.5 ml intramuscularly and after 10-12 days Inj. Dinoprost(R) 5 ml intramuscularly and 75 % cases showed positive response. Our results reflects the present scenario of anestrus and its management. Further study on pathophysiological mechanism of ovarian cyst that leads the anoestrus in dairy cows can give a new window to fight against anestrus in dairy cows.