الفهرس | Only 14 pages are availabe for public view |
Abstract Cystic ovarian disease (COD) is a common ovarian disorder diagnosed in dairy cattle and is an important cause of reproductive failure and economic loss for the dairy industry and it has been accepted that cows with COD were infertile until the condition resolved. The importance of studying cystic conditions lies in the consequences they have for the dairy producer. As most cysts are anovulatory, they cause severe delays in the reproductive efficiency of affected animals, leading to decreased milk production over time. This inevitably can affect the bottom line and cause the dairy producer to lose money. The objectives of this study were: 1- To evaluate different therapeutic strategies of COD treatment using terms of the reproductive parameters as estrus detection rate, interval from treatment to first estrus, pregnancy rate after first service, return rate, pregnancy rate after second service and total pregnancy rate by 3 different treatment methods. 2- To evaluate the reproductive efficiency of cystic cows after diagnosis and treatment according to days in milk (DIM). 3- To measure the level of progesterone at the beginning and at the end of treatment. A total of 85 Holstein dairy cows suffering from cystic ovarian follicles were divided into 4 groups based on the type of treatment as following: Group 1 (Control): this group included 10 cystic Holstein dairy cows left without treatment. |