Ashok Prajapati, A. Dhami, K. Hadiya, J. Patel, J. Prajapati
{"title":"不同发情同步方案对无循环和循环杂交奶牛发情诱导反应和受孕率的影响","authors":"Ashok Prajapati, A. Dhami, K. Hadiya, J. Patel, J. Prajapati","doi":"10.33785/IJDS.2019.V72I02.012","DOIUrl":null,"url":null,"abstract":"A study was carried out under field conditions on 50 acyclic/anestrus and 50 cyclic/ repeat breeder HF crossbred cows to evaluate the efficacy of four standard estrus induction/ ovulation synchronization protocols, viz., Ov_synch (GPG), Ov_synch Plus (PMSG+GPG), Double_synch (P-GPG) and Estradoublesynch (P-GPE) (10 cows in each protocol, and in untreated controls) in terms of estrus induction response and conception rates at induced estrus with fixed time AI (FTAI) and overall of 3 cycles. All the selected animals received presynchronization treatment, viz., Inj. Ivermectin s.c. and Tonovita i.m. once and multimineral bolus once daily for 7 days. Repeat breeding cows received additional single shot i.m. injection of Enrofloxacin. All the anestrus and repeat breeder cows (100 %) under all four treatment protocols exhibited induced estrus between 48 and 72 hrs from PGF 2 α injection. The conception rates obtained in anestrus cows at induced estrus (FTAI) and overall of three cycles post-treatment were 20.0 and 60.0% with Ov_synch; 20.0 and 50.0% with Ov_synch Plus; 40.0 and 80.0% with Double_synch, and 30.0 and 60.0% with Estradoublesynch protocol, respectively. The corresponding conception rates in repeat breeder cows were 30.0 and 70.0% with Ov_synch; 30.0 and 50.0% with Ov_synch Plus; 40.0 and 80.0% with Double_synch, and 20.0 and 60.0% with Estradoublesynch protocol, respectively. All non-conceived repeat breeding cows under each protocol, except 1 in Ov_synch Plus protocol, continued cycling, while among 10 anestrus cows each treated with Ov_synch, Ov_synch Plus, Double_synch and Estradoublesynch protocol, 2, 2, 0 and 1 cows again turned out to be anestrus by 60 days post-induction/FTAI, respectively. Among the untreated control anestrus and repeat breeder cows (10 each), 2 and 3 cows conceived over a period of 90 days follow up giving overall conception rates of only 20.0 and 30.0%, respectively, as against the overall fertility rate of 62.5 and 65.0 % in treated anestrus and repeat breeder cows, respectively, over just mean 28-32 days of treatment, suggesting the economic utility of these protocols in handling the problem breeder cows under field conditions.","PeriodicalId":179606,"journal":{"name":"Vol 72, No 2 (2019)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2019-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Efficacy of different estrus synchronization protocols on estrus induction\\nresponse and conception rate in acyclic and cyclic crossbred cows\",\"authors\":\"Ashok Prajapati, A. Dhami, K. Hadiya, J. Patel, J. Prajapati\",\"doi\":\"10.33785/IJDS.2019.V72I02.012\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A study was carried out under field conditions on 50 acyclic/anestrus and 50 cyclic/ repeat breeder HF crossbred cows to evaluate the efficacy of four standard estrus induction/ ovulation synchronization protocols, viz., Ov_synch (GPG), Ov_synch Plus (PMSG+GPG), Double_synch (P-GPG) and Estradoublesynch (P-GPE) (10 cows in each protocol, and in untreated controls) in terms of estrus induction response and conception rates at induced estrus with fixed time AI (FTAI) and overall of 3 cycles. All the selected animals received presynchronization treatment, viz., Inj. Ivermectin s.c. and Tonovita i.m. once and multimineral bolus once daily for 7 days. Repeat breeding cows received additional single shot i.m. injection of Enrofloxacin. All the anestrus and repeat breeder cows (100 %) under all four treatment protocols exhibited induced estrus between 48 and 72 hrs from PGF 2 α injection. The conception rates obtained in anestrus cows at induced estrus (FTAI) and overall of three cycles post-treatment were 20.0 and 60.0% with Ov_synch; 20.0 and 50.0% with Ov_synch Plus; 40.0 and 80.0% with Double_synch, and 30.0 and 60.0% with Estradoublesynch protocol, respectively. The corresponding conception rates in repeat breeder cows were 30.0 and 70.0% with Ov_synch; 30.0 and 50.0% with Ov_synch Plus; 40.0 and 80.0% with Double_synch, and 20.0 and 60.0% with Estradoublesynch protocol, respectively. All non-conceived repeat breeding cows under each protocol, except 1 in Ov_synch Plus protocol, continued cycling, while among 10 anestrus cows each treated with Ov_synch, Ov_synch Plus, Double_synch and Estradoublesynch protocol, 2, 2, 0 and 1 cows again turned out to be anestrus by 60 days post-induction/FTAI, respectively. Among the untreated control anestrus and repeat breeder cows (10 each), 2 and 3 cows conceived over a period of 90 days follow up giving overall conception rates of only 20.0 and 30.0%, respectively, as against the overall fertility rate of 62.5 and 65.0 % in treated anestrus and repeat breeder cows, respectively, over just mean 28-32 days of treatment, suggesting the economic utility of these protocols in handling the problem breeder cows under field conditions.\",\"PeriodicalId\":179606,\"journal\":{\"name\":\"Vol 72, No 2 (2019)\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-04-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Vol 72, No 2 (2019)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.33785/IJDS.2019.V72I02.012\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vol 72, No 2 (2019)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.33785/IJDS.2019.V72I02.012","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Efficacy of different estrus synchronization protocols on estrus induction
response and conception rate in acyclic and cyclic crossbred cows
A study was carried out under field conditions on 50 acyclic/anestrus and 50 cyclic/ repeat breeder HF crossbred cows to evaluate the efficacy of four standard estrus induction/ ovulation synchronization protocols, viz., Ov_synch (GPG), Ov_synch Plus (PMSG+GPG), Double_synch (P-GPG) and Estradoublesynch (P-GPE) (10 cows in each protocol, and in untreated controls) in terms of estrus induction response and conception rates at induced estrus with fixed time AI (FTAI) and overall of 3 cycles. All the selected animals received presynchronization treatment, viz., Inj. Ivermectin s.c. and Tonovita i.m. once and multimineral bolus once daily for 7 days. Repeat breeding cows received additional single shot i.m. injection of Enrofloxacin. All the anestrus and repeat breeder cows (100 %) under all four treatment protocols exhibited induced estrus between 48 and 72 hrs from PGF 2 α injection. The conception rates obtained in anestrus cows at induced estrus (FTAI) and overall of three cycles post-treatment were 20.0 and 60.0% with Ov_synch; 20.0 and 50.0% with Ov_synch Plus; 40.0 and 80.0% with Double_synch, and 30.0 and 60.0% with Estradoublesynch protocol, respectively. The corresponding conception rates in repeat breeder cows were 30.0 and 70.0% with Ov_synch; 30.0 and 50.0% with Ov_synch Plus; 40.0 and 80.0% with Double_synch, and 20.0 and 60.0% with Estradoublesynch protocol, respectively. All non-conceived repeat breeding cows under each protocol, except 1 in Ov_synch Plus protocol, continued cycling, while among 10 anestrus cows each treated with Ov_synch, Ov_synch Plus, Double_synch and Estradoublesynch protocol, 2, 2, 0 and 1 cows again turned out to be anestrus by 60 days post-induction/FTAI, respectively. Among the untreated control anestrus and repeat breeder cows (10 each), 2 and 3 cows conceived over a period of 90 days follow up giving overall conception rates of only 20.0 and 30.0%, respectively, as against the overall fertility rate of 62.5 and 65.0 % in treated anestrus and repeat breeder cows, respectively, over just mean 28-32 days of treatment, suggesting the economic utility of these protocols in handling the problem breeder cows under field conditions.