الفهرس | Only 14 pages are availabe for public view |
Abstract The long post-partum anoestrus in buffalo is a major factor for long calving interval and low reproductive efficiency. This study was conducted on 29 buffalo randomly from different farmers during the period from May to October (2012). The animals were suffering from prolonged postpartum anestrous (3 - 9 months). The main purpose of this study was to evaluate the effect of P4 supplementation (CIDR) in the course of ovsynch protocols in the treatment of post-partum an estrous buffalo with subsequent resumption of cyclicity and reduction of calving interval. The buffaloes under the study were marked by ear tag numbers and had been divided according to the treatment and insertion of the CIDR device into three groups as following; 1-Control group (CTL): include 6 buffaloes have only ovsynch protocol without CIDR insertion. 2-CIDR-A group: include 10 buffaloes have CIDR within ovsynch protocol.3-CIDR-B group: include 13 buffaloes have CIDR inserted before ovsynch protocol. The blood sample were collected at the days of study as following; day - 10, 0, 4, 7, 9 and 60) for determination of P4 levels and phosphorus level. Pregnancy diagnosis was determined at 60 days post insemination by using rectal palpation. The overall question for this study was whether initiation of the CIDR plus Ovsynch protocols produces differences in the rates of synchronized pregnancy and ovulation compared to Ovsynch protocols in anestroussupplementation from a CIDR insert before and as a part of the ovsynch protocols would improve fertility. In the present study, providing exogenous P4 improved the conception rate in the post partum anestrous buffalo as following 1-Control group: The conception rate was 66, 7 %. 2-CIDR-A group: The conception rate was 30%. 3-CIDR-B group: The conception rate was 53, 8%.from the previous result our present study suggests that: Using of CIDR before applying the GPG synchronization regimen could be more beneficial in improving the conception rates in buffaloes. Since the animals may utilize more phosphorus and other metabolites in activating the follicular dynamics and ripening the conceiving oocyte in the ovulatory follicle. · Using of ovsynch protocol (GPG) in postpartum buffalo had a higher significant pregnancy rate than using of CIDR within or before GPG. |