National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The experiment was conducted on 20 Marwari mares of age between 4-10 years, during transitional period (January - March). They were randomly divided into two groups. In group 1 (control group; n=10) ovarian ultrasonography was done using linear array transducer to detect dominant follicle (≥30mm) on any of the ovaries in mares showing estrus signs. Mares were covered twice after 36 hours interval. In group 2 (treatment group; n=10) ultrasonography was done for detection of ovarian status. Mares with mature corpus luteum (CL) and growing follicle between 18mm-24mm in size were synchronized with hormonal protocol based on prostaglandin (PGs 500 µg) and Human chorionic gonadotropin(HcG 3000 I.U.).Day of detection of mature CL was considered as day 1. On day 1 morning mares were administered PG intramuscular followed by administration of chorulon intravenously on 6th day morning and after 8 days again PG intramuscular on day 14th morning followed by chorulon intravenously on 20th day morning. Mares were covered twice after 36 hours of interval between 12-48 hours post last chorulon injection. It was concluded that during transition period the incidence of large dominant follicles regression without ovulation is very high and conception rates are very low (40%). The application of exogenous hormones to monitor normal estrus length and ovulation is quite effective during transtition period. Hormones protocols based on Prostglandins and HcG will leads to successfully regulates normal length of estrus and ovulation in indigenous mares and high conception rates (70 %) are achieved.
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