Tamil Nadu Veterinary and Animal Sciences University, Chennai
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Browsing Tamil Nadu Veterinary and Animal Sciences University, Chennai by Subject "Animal Reproduction and Gynecology"
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ThesisItem Open Access ASSESSMENT OF THERAPEUTIC AND PROPHYLACTIC SUPPLEMENTS USAGE PATTERN IN COMMERCIAL LAYERS(TANUVAS, Chennai, 2017) Divyabharathi, S.; Prabu, M.; Senthilkumar, V.; Rajendran, K.; TANUVASA study was conducted to assess the therapeutic and prophylactic supplements usage pattern in commercial layers in Namakkal district and to study the relationship with its usage and performance. The data for the period 2015-16 was collected during the months of December 2016 to February 2017 from 60 commercial layer farms selected randomly from four blocks of Namakkal district. Descriptive statistics, regression analysis and Garrett's ranking techniques were used to analyse the data.ThesisItem Open Access Developmental Gene Expression and Apoptotic Changes in In-Vitro produced Caprine Embryos Following Simple and Solid-Surface Vitrification Techniques(TANUVAS, Chennai, 2014) Das, Ananga Kumar; TANUVAS; Balasubramanian, S.; Krishnakumar, K.; Parthiban, M.The development of mammalian pre-implantation embryo is a complex process, and precise expression of genes at different times and regions of genome is the premise of the normal process. By studying different stage-specific gene expression patterns, we can obtain information on genes and also analyze and explain the functions of these stage-specific genes in the process of embryo development as well.ThesisItem Open Access Monitoring Ovarian Dynamics in Normal and Synchronised Oestrous Cycle in Murrah Graded Buffaloes(TANUVAS, 2008) Dharani, S.; TANUVAS; Kathiresan, D.; Devanathan, T.G.; Balachandran, C.ThesisItem Open Access Morphological and Histological Studies of Goat Testis and Epididymis(TANUVAS, 1990) Baegan, S.; TANUVAS; Quayam, Syed Abdul; Thangaraju, P.; Kathiresan, D.ThesisItem Open Access Reproduction in Dogs - Studies on Semen Collection, Evaluation, Cryopreservation, Insemination and Fertility in German Shepherd Dogs in Madras City(TANUVAS, 1990) Fredrick, G. Paul; TANUVAS; Quayam, Syed Abdul; Seshagiri, V.N.; Edwin, JohnThesisItem Open Access Ultrasonographic Evaluation of Ovarian Status, Fertility Assessment and Endocrine Profile on GnRH Administration in Progesterone Induced Oestrus Crossbred Cows(TANUVAS, Chennai, 2014) Arun, R.; TANUVAS; Krishnakumar, K.; Balasubramanian, S.; Gopi, H.Numerous oestrus synchronization programmes were developed to precisely control the follicular development, but not given sufficient precision to predict higher level of success in bovine. Hence, the present study was formulated to determine the effect of GnRH administration before and at the time of insemination in mid luteal phase (day 9 to 12 of oestrous cycle) application of CIDR plus PGF2 induced oestrus in crossbred cows.ThesisItem Open Access Ultrasonographic Study of Follicular Dynamics in Normal Cyclical and Superovulated Murrah Buffaloes(TANUVAS, Chennai, 2008) Kavitha, P.; TANUVAS; Chandrahasan, C.; Nanjappan, K.; Krishnakumar, K.Ovarian follicular development in buffalo is a dynamic sequence of wave like organized event and understanding the ovarian follicular wave pattern would enable us to implement the technologies like estrus synchronization, multiple ovulation embryo transfer programme etc., more effectively. The study was designed to monitor the normal and superovulatory estrous cycles in Murrah buffaloes. Four pluriparous normal cyclical Murrah buffaloes maintained at Livestock Farm, Veterinary College and Research Institute, Namakkal, Tamil Nadu, were utilized. A total of eight normal (control) and eight superovulated cycles were studied ultrasonographically for the follicular wave pattern and ovulatory response. In control group, the ovaries were examined ultrasonically daily throughout the estrous cycle. Then the experimental animals were randomly divided into 2 groups as group I and II comprising of 2 buffalos in each group. Superovulation was induced by injection of Follicle Stimulating Hormone (FSH) twice daily for four days in tapering dose (total dose 400 mg) and a single injection of 2000 IU equine chorionic gonadotropin (eCG) in group I and II buffaloes, respectively starting on day 10 of estrous cycle. Prostaglandin F2α (PGF2α) was injected at 48 and 72 h of the initiation of superovulatory treatment. Ovarian structures were monitored daily for five days from the day of initiation of superovulatory treatment to the day of superovulatory estrus and 5th day after superovulatory estrus. In the present study, 62.50 per cent of the normal cycles exhibited 2-wave cycles, while the remaining had 3-wave cycles with an interestrus interval of 21.60 ± 0.51 and 22.67 ± 0.88 days, respectively. In 2-wave estrous cycles the waves emerged on day 1.40 ± 0.24 and 11.80 ± 0.37. The dominant follicle of the first and second waves reached the maximum size of 12.00 ± 0.32 and 14.20 ± 1.02 mm on day 11.80 ± 0.37 and 21.60 ± 0.47, respectively of the estrous cycle. The growth phase and growth rate of the first and second wave dominant follicles were found to be significantly not different. In 3-wave estrous cycles, the waves emerged on day 0.67 ± 0.33, 8.33 ± 0.33 and 16.67 ± 0.33. The first, second and third wave dominant follicles reached the maximum size of 11.83 ± 0.44, 11.67 ± 0.44 and 13.33 ± 0.67 mm on days 8.33 ± 0.33, 16.67 ± 0.33 and 22.67 ± 0.88, respectively. In superovulated cycles the overall mean (± SE) number of follicles during the four days in group I and II were 4.25 ± 0.48, 5.75 ± 0.48, 8.00 ± 1.47 and 9.25 ± 1.97 and 5.00 ± 0.82, 7.00 ± 0.71, 8.50 ± 1.32 and 9.25 ± 1.65, respectively. On the day of superovulatory estrus, the overall mean number of follicles differed significantly from 9.25 ± 1.97 to 10.25 ± 0.75 in group I and from 9.25 ± 1.65 to 8.50 ± 0.65 in group II. A mean number of 1.00 ± 0.00 and 1.25 ± 0.25 dominant follicles in group I and II were found on the day of initiation of superovulatory treatment and it had no significant relationship on the superovulatory response.