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Kerala Veterinary and Animal Sciences University, Wayanad

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20171
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Subject: Veterinary Gynaecology and Obstetrics × Author: Narmada, M × End date: 2019 × Start date: 2015 × Thesis Type: M.V.Sc. ×
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    ThesisItemOpen Access
    ULTRASONOGRAPHIC CHARACTERIZATION OF FOLLICULAR DYNAMICS IN POST-PARTUM ATTAPPADY BLACK DOES.
    (College of Veterinary and animal Science,Mannuthy, 2017) Narmada, M; Amritha Aravind
    Thirteen Attappadi Black does with a body condition score of 2.5-3.5 in the last month of gestation were selected for the present investigation. Transrectal uterine and ovarian ultrasonography was performed on alternate days from day seven postpartum to study the uterine involution and post-partum follicular dynamics.The average litter size observed was 1.92±0.13. Blood samples were collected at weekly interval from day seven to sixty postpartum for estimating serum progesterone. The mean number of days required for uterine involution was day 27 postpartum and mean day of first post-partum ovulation was on 45.15±2.66. The mean progesterone value was at basal level on day 7 post-partum (0.04-0.06 ng/mL) for all animals and showed a progressive increase after day 4 of first ovulation. Percentage of animals showing short cycles with a mean duration of 8.4 days were 38.46. In animals, showing three wave pattern of oestrous cycle (69.23 per cent), the day of emergence of first, second and ovulatory wave was on 0.00±0.00, 6.66±0.33 and 12.22±0.22 respectively. In animals, showing four wave pattern (30.76 per cent) day of emergence of first, second, third and ovulatory wave was on 0.00±0.00, 6.00±0.00, 10.50±0.50 and 14.50±0.50 respectively. The follicles of first and last wave attained maximum diameters in both wave patterns.Ovulation occurred from third and fourth wave in animals with three and four wave pattern in which the maximum diameter of the ovulatory follicle was 7.62±0.08 mm and 7.50±0.20 mm respectively. The first interwave intervals were longer irrespective of the number of waves per cycle. The mean day of ovulation was 21.33±0.33 and 21.50±0.28 in three and four wave cycles respectively and the mean duration of oestrus was 29.76±1.44 h (22-38 h).